10.10 Lab*: Heap ADT

Refactor Customer.h slightly

04-dl-lists/StudentList.cpp

@@ -83,10 +83,6 @@ bool StudentList::insertNode(Student dataIn) {
     ListNode *newNode;  // A new node
     ListNode *pCur;     // To traverse the list
 
-    // Allocate a new node and store num there.
-    newNode = new ListNode;
-    newNode->stu = dataIn;
-
     // Initialize pointers
     pCur = head->forw;
 
@@ -98,6 +94,10 @@ bool StudentList::insertNode(Student dataIn) {
     // Return false early if the name is a duplicate
     if (pCur->stu.name == dataIn.name) return false;
 
+    // Allocate a new node and store num there.
+    newNode = new ListNode;
+    newNode->stu = dataIn;
+
     // Insert the new node between pPre and pCur
     ListNode *pPre = pCur->back;     // The previous node
     pPre->forw = newNode;

05-trees/.idea/.gitignore

@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

05-trees/.idea/.name

@@ -0,0 +1 @@
+05_trees

05-trees/.idea/05-trees.iml

@@ -0,0 +1,2 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module classpath="CMake" type="CPP_MODULE" version="4" />

05-trees/.idea/inspectionProfiles/Project_Default.xml

@@ -0,0 +1,6 @@
+<component name="InspectionProjectProfileManager">
+  <profile version="1.0">
+    <option name="myName" value="Project Default" />
+    <inspection_tool class="Eslint" enabled="true" level="WARNING" enabled_by_default="true" />
+  </profile>
+</component>

05-trees/.idea/misc.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CMakeWorkspace" PROJECT_DIR="$PROJECT_DIR$" />
+</project>

05-trees/.idea/modules.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/05-trees.iml" filepath="$PROJECT_DIR$/.idea/05-trees.iml" />
+    </modules>
+  </component>
+</project>

05-trees/.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/.." vcs="Git" />
+  </component>
+</project>

05-trees/BinarySearchTree.h

@@ -14,9 +14,10 @@ public:
     bool insert(const ItemType &item);
 
     // remove a node if found
-    //bool remove(const ItemType &item);
+    // bool remove(const ItemType &item);
     // find a target node
-    //bool search(const ItemType &target, ItemType &returnedItem) const;
+    bool search(const ItemType &target, ItemType &returnedItem) const;
+
     // find the smallest node
     bool findSmallest(ItemType &returnedItem) const;
 
@@ -28,35 +29,35 @@ private:
     BinaryNode<ItemType> *_insert(BinaryNode<ItemType> *nodePtr, BinaryNode<ItemType> *newNode);
 
     // search for target node
-    //BinaryNode<ItemType>* _search(BinaryNode<ItemType>* treePtr, const ItemType &target) const;
+    BinaryNode<ItemType> *_search(BinaryNode<ItemType> *treePtr, const ItemType &target) const;
 
     // find the smallest node
     BinaryNode<ItemType> *_findSmallest(BinaryNode<ItemType> *nodePtr, ItemType &smallest) const;
 
-    // find the biggest node
+    // find the largest node
     BinaryNode<ItemType> *_findLargest(BinaryNode<ItemType> *nodePtr, ItemType &smallest) const;
 
     // internal remove node: locate and delete target node under nodePtr subtree
     // BinaryNode<ItemType>* _remove(BinaryNode<ItemType>* nodePtr, const ItemType target, bool &success);
 
     // delete target node from tree, called by internal remove node
-    //  BinaryNode<ItemType>* _removeNode(BinaryNode<ItemType>* targetNodePtr);
+    // BinaryNode<ItemType>* _removeNode(BinaryNode<ItemType>* targetNodePtr);
 
     // remove the leftmost node in the left subtree of nodePtr
-    //  BinaryNode<ItemType>* _removeLeftmostNode(BinaryNode<ItemType>* nodePtr, ItemType &successor);
+    // BinaryNode<ItemType>* _removeLeftmostNode(BinaryNode<ItemType>* nodePtr, ItemType &successor);
 
 };
 
 ///////////////////////// public function definitions ///////////////////////////
-// Inserting items within a tree
+// Wrapper for _insert - Inserting items within a tree
 template<class ItemType>
 bool BinarySearchTree<ItemType>::insert(const ItemType &newEntry) {
-    BinaryNode<ItemType> *newNodePtr = new BinaryNode<ItemType>(newEntry);
+    auto *newNodePtr = new BinaryNode<ItemType>(newEntry);
     this->rootPtr = _insert(this->rootPtr, newNodePtr);
+    this->count++;
     return true;
 }
 
-
 // Finding the smallest, which is the leftmost leaf (wrapper function)
 template<class ItemType>
 bool BinarySearchTree<ItemType>::findSmallest(ItemType &returnedItem) const {
@@ -65,7 +66,7 @@ bool BinarySearchTree<ItemType>::findSmallest(ItemType &returnedItem) const {
     return temp != nullptr;
 }
 
-// Finding the biggest, which is the rightmost leaf (wrapper function)
+// Finding the largest, which is the rightmost leaf (wrapper function)
 template<class ItemType>
 bool BinarySearchTree<ItemType>::findLargest(ItemType &returnedItem) const {
     BinaryNode<ItemType> *temp = nullptr;
@@ -73,33 +74,50 @@ bool BinarySearchTree<ItemType>::findLargest(ItemType &returnedItem) const {
     return temp != nullptr;
 }
 
+// Wrapper for _search
+// - it calls the private _search function that returns a Node pointer or NULL
+// - if found, it copies data from that node and sends it back to the caller
+//   via the output parameter, and returns true, otherwise it returns false.
+template<class ItemType>
+bool BinarySearchTree<ItemType>::search(const ItemType &anEntry, ItemType &returnedItem) const {
+    BinaryNode<ItemType> *temp = nullptr;
+    temp = _search(this->rootPtr, anEntry);
+
+    if (temp != nullptr) {
+        returnedItem = temp->getItem();
+        return true;
+    }
+    return false;
+}
+
+
 //////////////////////////// private functions ////////////////////////////////////////////
 
-// Implementation of the insert operation - iterative algorithm
+// Recursive implementation of the insert operation
 template<class ItemType>
 BinaryNode<ItemType> *BinarySearchTree<ItemType>::_insert(BinaryNode<ItemType> *nodePtr,
                                                           BinaryNode<ItemType> *newNodePtr) {
-    BinaryNode<ItemType> *pWalk = nodePtr, *parent = nullptr;
+    // Base case: tree is empty
+    if (nodePtr == nullptr) return newNodePtr;
 
-    if (!nodePtr) // == NULL
+    // Inserting larger item to the right:
-    {
+    if (nodePtr->getItem() < newNodePtr->getItem()) {
-        nodePtr = newNodePtr;
+        // Recurse if right child is not null
-        return nodePtr;
+        if (nodePtr->getRightPtr() != nullptr)
-    } else {
+            _insert(nodePtr->getRightPtr(), newNodePtr);
-        while (pWalk) // != NULL
+            // Otherwise, insert the new node
-        {
+        else nodePtr->setRightPtr(newNodePtr);
-            parent = pWalk;
+    }
-            if (pWalk->getItem() > newNodePtr->getItem())
+        // Inserting smaller item to the left:
-                pWalk = pWalk->getLeftPtr();
+    else {
-            else
+        // Recurse if left child is not null
-                pWalk = pWalk->getRightPtr();
+        if (nodePtr->getLeftPtr() != nullptr)
-        }
+            _insert(nodePtr->getLeftPtr(), newNodePtr);
-        if (parent->getItem() > newNodePtr->getItem())
+            // Otherwise, insert the new node
-            parent->setLeftPtr(newNodePtr);
+        else nodePtr->setLeftPtr(newNodePtr);
-        else
-            parent->setRightPtr(newNodePtr);
     }
 
+    // Return the root node
     return nodePtr;
 }
 
@@ -124,4 +142,22 @@ BinaryNode<ItemType> *BinarySearchTree<ItemType>::_findLargest(BinaryNode<ItemTy
     return _findLargest(nodePtr->getRightPtr(), biggest);
 }
 
-#endif
+// Recursive implementation of the search operation
+// - return NULL if target not found, otherwise
+// - returns a pointer to the node that matched the target
+template<class ItemType>
+BinaryNode<ItemType> *BinarySearchTree<ItemType>::_search(BinaryNode<ItemType> *nodePtr,
+                                                          const ItemType &target) const {
+    // Two base cases: root is NULL or target is found
+    if (nodePtr == nullptr) return nullptr;
+    if (nodePtr->getItem() == target) return nodePtr;
+
+    // Recursive cases, search either left or right subtree based on the target
+    if (target < nodePtr->getItem()) return _search(nodePtr->getLeftPtr(), target);
+    if (target > nodePtr->getItem()) return _search(nodePtr->getRightPtr(), target);
+
+    // To prevent compiler warning
+    return nullptr;
+}
+
+#endif

05-trees/BinaryTree.h

@@ -35,30 +35,36 @@ public:
         count = 0;
     }
 
-    void preOrder(void visit(ItemType &)) const { _preorder(visit, rootPtr); }
+    void preOrder(void visit(const ItemType &)) const { _preorder(visit, rootPtr); }
 
-    void inOrder(void visit(ItemType &)) const { _inorder(visit, rootPtr); }
+    void inOrder(void visit(const ItemType &)) const { _inorder(visit, rootPtr); }
 
-    void postOrder(void visit(ItemType &)) const { _postorder(visit, rootPtr); }
+    void postOrder(void visit(const ItemType &)) const { _postorder(visit, rootPtr); }
-    // void printTree(void visit(ItemType &, int)) const{_printTree(visit, rootPtr, 1);}
+
+    void printTree(void visit(const ItemType &, int)) const { _printTree(visit, rootPtr, 1); }
+
+    void printInnerNodes(void visit(const ItemType &)) const { _printInnerNodes(visit, rootPtr); }
 
     // abstract functions to be implemented by derived class
     virtual bool insert(const ItemType &newData) = 0;
+
     //virtual bool remove(const ItemType &data) = 0;
-    //virtual bool search(const ItemType &target, ItemType & returnedItem) const = 0;
+    virtual bool search(const ItemType &target, ItemType &returnedItem) const = 0;
 
 private:
     // delete all nodes from the tree
     void destroyTree(BinaryNode<ItemType> *nodePtr);
 
     // internal traverse
-    void _preorder(void visit(ItemType &), BinaryNode<ItemType> *nodePtr) const;
+    void _preorder(void visit(const ItemType &), BinaryNode<ItemType> *nodePtr) const;
 
-    void _inorder(void visit(ItemType &), BinaryNode<ItemType> *nodePtr) const;
+    void _inorder(void visit(const ItemType &), BinaryNode<ItemType> *nodePtr) const;
 
-    void _postorder(void visit(ItemType &), BinaryNode<ItemType> *nodePtr) const;
+    void _postorder(void visit(const ItemType &), BinaryNode<ItemType> *nodePtr) const;
-    // void _printTree(void visit(ItemType &, int), BinaryNode<ItemType>* nodePtr, int level) const;
 
+    void _printTree(void visit(const ItemType &, int), BinaryNode<ItemType> *nodePtr, int level) const;
+
+    void _printInnerNodes(void visit(const ItemType &), BinaryNode<ItemType> *nodePtr) const;
 };
 
 // Destroy the entire tree
@@ -75,7 +81,7 @@ void BinaryTree<ItemType>::destroyTree(BinaryNode<ItemType> *nodePtr) {
 
 // Preorder Traversal
 template<class ItemType>
-void BinaryTree<ItemType>::_preorder(void visit(ItemType &), BinaryNode<ItemType> *nodePtr) const {
+void BinaryTree<ItemType>::_preorder(void visit(const ItemType &), BinaryNode<ItemType> *nodePtr) const {
     if (nodePtr == nullptr) return;
 
     ItemType item = nodePtr->getItem();
@@ -87,7 +93,7 @@ void BinaryTree<ItemType>::_preorder(void visit(ItemType &), BinaryNode<ItemType
 
 // Inorder Traversal
 template<class ItemType>
-void BinaryTree<ItemType>::_inorder(void visit(ItemType &), BinaryNode<ItemType> *nodePtr) const {
+void BinaryTree<ItemType>::_inorder(void visit(const ItemType &), BinaryNode<ItemType> *nodePtr) const {
     if (nodePtr) // != NULL
     {
         ItemType item = nodePtr->getItem();
@@ -99,7 +105,7 @@ void BinaryTree<ItemType>::_inorder(void visit(ItemType &), BinaryNode<ItemType>
 
 // Postorder Traversal
 template<class ItemType>
-void BinaryTree<ItemType>::_postorder(void visit(ItemType &), BinaryNode<ItemType> *nodePtr) const {
+void BinaryTree<ItemType>::_postorder(void visit(const ItemType &), BinaryNode<ItemType> *nodePtr) const {
     if (nodePtr == nullptr) return;
 
     _postorder(visit, nodePtr->getLeftPtr());
@@ -108,4 +114,26 @@ void BinaryTree<ItemType>::_postorder(void visit(ItemType &), BinaryNode<ItemTyp
     visit(item);
 }
 
+// Prints tree as an indented list
+template<class ItemType>
+void BinaryTree<ItemType>::_printTree(void visit(const ItemType &, int), BinaryNode<ItemType> *nodePtr, int level) const {
+    if (nodePtr == nullptr) return;
+
+    ItemType item = nodePtr->getItem();
+    visit(item, level);
+    _printTree(visit, nodePtr->getRightPtr(), level + 1);
+    _printTree(visit, nodePtr->getLeftPtr(), level + 1);
+}
+
+// Prints inner nodes
+template<class ItemType>
+void BinaryTree<ItemType>::_printInnerNodes(void visit(const ItemType &), BinaryNode<ItemType> *nodePtr) const {
+    if (nodePtr == nullptr || nodePtr->isLeaf()) return;
+
+    ItemType item = nodePtr->getItem();
+    _printInnerNodes(visit, nodePtr->getLeftPtr());
+    visit(item);
+    _printInnerNodes(visit, nodePtr->getRightPtr());
+}
+
 #endif

05-trees/CMakeLists.txt

@@ -6,4 +6,6 @@ set(CMAKE_CXX_STANDARD 20)
 add_executable(05_trees main.cpp
         BinaryTree.h
         BinaryNode.h
-        BinarySearchTree.h)
+        BinarySearchTree.h
+        Park.cpp
+        Park.h)

05-trees/Park.cpp

@@ -0,0 +1,80 @@
+// Implementation file for the Park class
+// Written By: Iurii Tatishchev
+// Reviewed By: Iurii Tatishchev
+// IDE: CLion
+
+#include <iostream>
+#include <iomanip>
+#include <string>
+
+#include "Park.h"
+
+using namespace std;
+
+// **************************************************
+// Constructor
+// **************************************************
+Park::Park() {
+    code = "";
+    state = "";
+    name = "";
+    description = "";
+    year = -1;
+}
+
+// **************************************************
+// Overloaded Constructor
+// **************************************************
+Park::Park(string cd, string st, string nm, string dsc, int yr) {
+    code = cd;
+    state = st;
+    name = nm;
+    description = dsc;
+    year = yr;
+}
+
+// Friend Functions Definitions
+
+// ***********************************************************
+// hDisplay
+// Displays code, state, and year data members of a Park object
+// on one line (horizontal display)
+// ***********************************************************
+void hDisplay(const Park &item) {
+    cout << item.code << "  ";
+    cout << item.state << "  ";
+    cout << item.year << "  ";
+    cout << endl;
+}
+
+// ***********************************************************
+// vDisplay
+// Displays name, description, state, and year of a Park object
+// one per line (vertical display)
+// ***********************************************************
+void vDisplay(const Park &item) {
+    cout << "       Name: " << item.name << endl;
+    cout << "Description: " << item.description << endl;
+    cout << "      State: " << item.state << endl;
+    cout << "       Year: " << item.year << endl;
+}
+
+// ***********************************************************
+// iDisplay
+// on one line, including the level number and
+// ".." for each indentation level
+// ***********************************************************
+void iDisplay(const Park &item, int level) {
+    for (int i = 1; i < level; i++)
+        cout << "..";
+    cout << level << "). " << item.code << endl;
+}
+
+// ***********************************************************
+// kDisplay
+// Displays the key: code of a Park object
+// on one line (key display)
+// ***********************************************************
+void kDisplay(const Park &park) {
+    cout << park.code << "\n";
+}

05-trees/Park.h

@@ -0,0 +1,88 @@
+// Specification file for the Park class
+// Written By: Iurii Tatishchev
+// Reviewed by: Iurii Tatishchev
+// IDE: CLion
+
+#ifndef PARK_H
+#define PARK_H
+
+// #include<iostream>
+#include<string>
+// #include<cstdlib>
+
+// using namespace std;
+// ^^^^^ This statement
+// in a header file of a complex project could create
+// namespace management problems for the entire project
+// (such as name collisions).
+// Do not write using namespace at the top level in a header file!
+
+using std::string;
+
+class Park {
+private:
+    string code;  // the unique park identifier
+    string state;
+    string name;
+    string description;
+    int year;
+
+public:
+    // constructors
+    Park();
+
+    Park(string, string, string, string, int);
+
+    // setters
+    void setCode(string cd) { code = cd; }
+
+    void setState(string st) { state = st; }
+
+    void setName(string nm) { name = nm; }
+
+    void setDesc(int dsc) { description = dsc; }
+
+    void setYear(int yr) { year = yr; }
+
+    // getters
+    string getCode() const { return code; }
+
+    string getState() const { return state; }
+
+    string getName() const { return name; }
+
+    string getDesc() const { return description; }
+
+    int getYear() const { return year; }
+
+    /* overloaded operators
+      - the stream insertion operator ( << )
+      - the relational operators (<, >, == )
+     */
+    friend std::ostream &operator<<(std::ostream &out, const Park &park);
+
+    bool operator<(const Park &park) const { return code < park.code; }
+
+    bool operator>(const Park &park) const { return code > park.code; }
+
+    bool operator==(const Park &park) const { return code == park.code; }
+
+    // friend functions
+    friend void hDisplay(const Park &);
+
+    friend void vDisplay(const Park &);
+
+    friend void iDisplay(const Park &item, int level);
+
+    friend void kDisplay(const Park &item);
+};
+
+void hDisplay(const Park &);
+
+void vDisplay(const Park &);
+
+void iDisplay(const Park &item, int level);
+
+void kDisplay(const Park &item);
+
+#endif

05-trees/main.cpp

@@ -1,74 +1,152 @@
 // BST ADT
-// Smallest/Largest
+// Created by Iurii Tatishchev
-// Name: Iurii Tatishchev
+// Modified by: Iurii Tatishchev
 
 #include "BinarySearchTree.h"
+#include "Park.h"
 #include <iostream>
+#include <iomanip>
+#include <fstream>
 #include <string>
+#include <cctype>
 
 using namespace std;
 
-void buildBST(int n, BinarySearchTree<int> &);
+void displayManager(const BinarySearchTree<Park> &bst);
 
-void hDisplay(int &);
+void buildBST(const string &filename, BinarySearchTree<Park> &bst);
-
-void vDisplay(int &);
 
+void searchManager(const BinarySearchTree<Park> &bst);
 
 int main() {
-    BinarySearchTree<int> bst;
+    string filename;
+    BinarySearchTree<Park> bst;
 
-    int n;
+    cout << "What is the input file's name? ";
-    char option;
+    getline(cin, filename);
-
+    buildBST(filename, bst);
-    cout << "What is the number of nodes in the BST? " << endl;
+    displayManager(bst);
-    cin >> n;
+    searchManager(bst);
-    cout << "Find Smallest or Largest[S/L]? " << endl;
-    cin >> option;
-
-    buildBST(n, bst);
-
-    if (n < 15) {
-        cout << "  Inorder: ";
-        bst.inOrder(hDisplay);
-        cout << endl;
-    }
-    if (option == 'S' || option == 's') {
-        int minVal;
-        bst.findSmallest(minVal);
-        cout << "Smallest: " << minVal << endl;
-    } else if (option == 'L' || option == 'l') {
-        int maxVal;
-        bst.findLargest(maxVal);
-        cout << "Largest: " << maxVal << endl;
-    }
 
     return 0;
 }
 
 /*
- buildBST: builds a binary search tree
+Display manager: traversals, count, indented tree, and inner nodes
- of integers
+Input Parameter: bst
 */
-void buildBST(int n, BinarySearchTree<int> &bst) {
+void displayManager(const BinarySearchTree<Park> &bst) {
-    int item;
 
-    while (n--) {
+    string option;
-        item = rand() % 30 + 10;
+
-        bst.insert(item);
+    // count
+    cout << "Display count [Y/N]?" << endl;
+    getline(cin, option);
+    option[0] = toupper(option[0]);
+    if (option == "Y") {
+        cout << "The number of nodes in the BST is ";
+        cout << bst.getCount() << endl;
     }
+
+    // traversals
+    cout << "Display Tree [In/Pre/posT/N]?" << endl;
+    getline(cin, option); // I, P, T or N
+    option[0] = toupper(option[0]);
+    switch (option[0]) {
+        case 'I':
+            cout << endl << "Inorder:" << endl;
+            bst.inOrder(hDisplay);
+            cout << endl;
+            break;
+        case 'P':
+            cout << endl << "Preorder:" << endl;
+            bst.preOrder(hDisplay);
+            cout << endl;
+            break;
+        case 'T':
+            cout << endl << "Postorder:" << endl;
+            bst.postOrder(hDisplay);
+            cout << endl;
+            break;
+        case 'N':
+            break;
+        default:
+            cout << "Invalid option!" << endl;
+            break;
+    }
+
+    // Indented Tree
+    cout << "Display Indented List [Y/N]?" << endl;
+    getline(cin, option);
+    option[0] = toupper(option[0]);
+    if (option == "Y") {
+        cout << "Indented List:" << endl;
+        bst.printTree(iDisplay);
+        cout << endl;
+    }
+
+    // Inner Nodes
+    cout << "Display Inner Nodes [Y/N]?" << endl;
+    getline(cin, option);
+    option[0] = toupper(option[0]);
+    if (option == "Y") {
+        cout << "Inner Nodes:" << endl;
+        bst.printInnerNodes(kDisplay);
+        cout << endl;
+    }
+
 }
 
-/*
+void buildBST(const string &filename, BinarySearchTree<Park> &bst) {
- horizontal display: all items on one line
+    ifstream inputFile(filename);
-*/
+    cout << "Reading data from \"" << filename << "\"" << endl;
-void hDisplay(int &item) {
+
-    cout << item << " ";
+    if (!inputFile) {
+        cout << "Error opening the input file: \"" << filename << "\"" << endl;
+        exit(EXIT_FAILURE);
+    }
+
+    string line;
+    while (getline(inputFile, line)) {
+        int year;
+        string code, name, state, dsc;
+
+        stringstream temp(line);    // create temp with data from line
+        temp >> code;               // read from temp
+        temp >> state;
+        temp >> year;
+        temp.ignore();              // to ignore space in front of name
+        getline(temp, name, ';');   // stop reading name at ';'
+        temp.ignore();              // to ignore space in front of description
+        getline(temp, dsc);
+        // create a Park object and initialize it with data from file
+        Park aPark(code, state, name, dsc, year);
+        bst.insert(aPark);
+    }
+
+    inputFile.close();
 }
 
-/*
+void searchManager(const BinarySearchTree<Park> &bst) {
- vertical display: one item per line
+    string targetCode = "";
-*/
+    Park aPark;
-void vDisplay(int &item) {
+
-    cout << item << endl;
+    cout << endl << " Search" << endl;
+    cout << "=======" << endl;
+
+    while (targetCode != "Q") {
+        cout << "Enter a park code (or Q to stop searching):" << endl;
+        getline(cin, targetCode);
+        // Convert targetCode to uppercase
+        for (char &c : targetCode) c = toupper(c);
+        if (targetCode != "Q") {
+            Park target;
+            target.setCode(targetCode);
+            if (bst.search(target, aPark))
+                vDisplay(aPark);
+            else
+                cout << "Park \"" << targetCode << "\" was not found in this list." << endl;
+        }
+    }
+    cout << "___________________END SEARCH SECTION _____" << endl;
 }

05-trees/national_parks.txt

@@ -0,0 +1,20 @@
+MOJ CA 1994 Mojave National Preserve; Spectacular Landscape in Absolute Solitude
+YOS CA 1890 Yosemite National Park; A Land of Giants
+LAS CA 1916 Lassen Volcanic National Park; Bubbling Below the Surface
+PRE CA 1962 Point Reyes National Seashore; Sky Above, Sea Beyond
+BRC UT 1928 Bryce Canyon National Park; Pillars of Stone
+DEV CA 1911 Devils Postpile National Monument; A Geologic Gem
+MUW CA 1908 Muir Woods National Monument; John Muir’s Cathedral
+CAL UT 1964 Canyonlands National Park; The Heart of the High Desert
+GLA MT 1910 Glacier National Park; Reflections of the Past
+ALC CA 1934 Alcatraz Island; Landmark Unlocked
+YEL WY 1872 Yellowstone National Park; Otherworldly on Earth
+ROC CO 1915 Rocky Mountain National Park; On Top of the World
+CRA OR 1902 Crater Lake National Park; Deep and Pristine Waters
+PIN CA 2013 Pinnacles National Park; Spectacular Remains of an Ancient Volcano
+DEN AK 1980 Denali National Park and Preserve; Beyond the Mountain
+ZIO UT 1919 Zion National Park; An Oasis Amidst the Desert
+JOS CA 1994 Joshua Tree National Park; The Outer Limits of Reality
+GRC AZ 1908 Grand Canyon National Park; A Sight Beyond Words
+ARC UT 1929 Arches National Park; Windows to the Sky
+DEA CA 1994 Death Valley National Park; A Land of Extremes

06-hash-tables/.idea/.gitignore

@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

06-hash-tables/.idea/.name

@@ -0,0 +1 @@
+06_hash_tables

06-hash-tables/.idea/06-hash-tables.iml

@@ -0,0 +1,2 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module classpath="CMake" type="CPP_MODULE" version="4" />

06-hash-tables/.idea/inspectionProfiles/Project_Default.xml

@@ -0,0 +1,6 @@
+<component name="InspectionProjectProfileManager">
+  <profile version="1.0">
+    <option name="myName" value="Project Default" />
+    <inspection_tool class="Eslint" enabled="true" level="WARNING" enabled_by_default="true" />
+  </profile>
+</component>

06-hash-tables/.idea/misc.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CMakeWorkspace" PROJECT_DIR="$PROJECT_DIR$" />
+</project>

06-hash-tables/.idea/modules.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/06-hash-tables.iml" filepath="$PROJECT_DIR$/.idea/06-hash-tables.iml" />
+    </modules>
+  </component>
+</project>

06-hash-tables/.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/.." vcs="Git" />
+  </component>
+</project>

06-hash-tables/CMakeLists.txt

@@ -0,0 +1,7 @@
+cmake_minimum_required(VERSION 3.28)
+project(06_hash_tables)
+
+set(CMAKE_CXX_STANDARD 20)
+
+add_executable(06_hash_tables main.cpp
+        Student.cpp)

06-hash-tables/HashNode.h

@@ -0,0 +1,50 @@
+// Specification file for the HashNode class
+// Written By: Iurii Tatishchev
+// Changed by: Iurii Tatishchev
+
+#ifndef _HASH_NODE
+#define _HASH_NODE
+
+// To do: convert to a template
+template<typename T>
+class HashNode {
+private:
+    T item;
+    int occupied;    // 1 -> occupied, 0 -> empty from start, -1 -> empty after removal
+    int noCollisions;
+
+public:
+    // constructors
+    HashNode() {
+        occupied = 0;
+        noCollisions = 0;
+    }
+
+    HashNode(T anItem) {
+        item = anItem;
+        occupied = 1;
+        noCollisions = 0;
+    }
+
+    HashNode(T anItem, int ocp, int nCol) {
+        item = anItem;
+        occupied = ocp;
+        noCollisions = nCol;
+    }
+
+    // setters
+    void setItem(const T &anItem) { item = anItem; }
+
+    void setOccupied(int ocp) { occupied = ocp; }
+
+    void setNoCollisions(int nCol) { noCollisions = nCol; }
+
+    // getters
+    T getItem() const { return item; }
+
+    int getOccupied() const { return occupied; }
+
+    int getNoCollisions() const { return noCollisions; }
+};
+
+#endif

06-hash-tables/HashTable.cpp

@@ -0,0 +1,81 @@
+// Implementation file for the Hash class
+// Written By: Iurii Tatishchev
+// Changed by: Iurii Tatishchev
+
+#include <string>
+#include <utility>
+
+#include "HashTable.h"
+
+using namespace std;
+
+/*~*~*~*
+  A simple hash function 
+ *~**/
+int HashTable::_hash(string key) const {
+    int sum = 0;
+    for (char c : key)
+        sum += c;
+    return sum % hashSize;
+};
+
+/*~*~*~*
+  hash insert - linear probe
+*~**/
+bool HashTable::insert(const Student &itemIn) {
+    if (count == hashSize)
+        return false;
+    int pos = _hash(itemIn.getName());
+    int collisions = 0;
+    while (hashAry[pos].getOccupied() == 1) {
+        ++pos;
+        ++collisions;
+        pos = pos % hashSize;
+    }
+    hashAry[pos].setItem(itemIn);
+    hashAry[pos].setOccupied(1);
+    hashAry[pos].setNoCollisions(collisions);
+    count++;
+
+    return true;
+}
+
+/*~*~*~*
+   hash delete - linear probe
+*~**/
+bool HashTable::remove(Student &itemOut, string key) {
+    int pos = _hash(key);
+    for (int collisions = 0; collisions < count; collisions++) {
+        if (hashAry[pos].getOccupied() == 1 && hashAry[pos].getItem().getName() == key) {
+            itemOut = hashAry[pos].getItem();
+            // -1 means freed
+            hashAry[pos].setOccupied(-1);
+            count--;
+            return true;
+        }
+        pos = (pos + 1) % hashSize;
+    }
+    return false;
+}
+
+/*~*~*~*
+   hash search - linear probe
+   search for key
+   if found: 
+      - copy data to itemOut
+      - copy number of collisions for this key to noCol
+      - returns true
+   if not found, returns false
+*~**/
+int HashTable::search(Student &itemOut, string key) const {
+    int pos = _hash(key);
+    for (int collisions = 0; collisions < count; collisions++) {
+        if (hashAry[pos].getOccupied() == 0) return -1;
+        if (hashAry[pos].getOccupied() == 1 && hashAry[pos].getItem().getName() == key) {
+            itemOut = hashAry[pos].getItem();
+            return hashAry[pos].getNoCollisions();
+        }
+        pos = (pos + 1) % hashSize;
+    }
+    return -1;
+}

06-hash-tables/HashTable.h

@@ -0,0 +1,120 @@
+// Specification file for the Hash class
+// Written By: Iurii Tatishchev
+// Changed by: Iurii Tatishchev
+
+
+#ifndef HASHTABLE_H_
+#define HASHTABLE_H_
+
+#include "HashNode.h"
+
+template<class ItemType>
+class HashTable {
+private:
+    HashNode<ItemType> *hashAry;
+    int hashSize;
+    int count;
+
+public:
+    HashTable() {
+        count = 0;
+        hashSize = 53;
+        hashAry = new HashNode<ItemType>[hashSize];
+    }
+
+    HashTable(int n) {
+        count = 0;
+        hashSize = n;
+        hashAry = new HashNode<ItemType>[hashSize];
+    }
+
+    ~HashTable() { delete[] hashAry; }
+
+    int getCount() const { return count; }
+
+    int getSize() const { return hashSize; }
+
+    double getLoadFactor() const { return 100.0 * count / hashSize; }
+
+    bool isEmpty() const { return count == 0; }
+
+    bool isFull() const { return count == hashSize; }
+
+    bool insert(const ItemType &itemIn, int h(const ItemType &key, int size));
+
+    bool remove(ItemType &itemOut, const ItemType &key, int h(const ItemType &key, int size));
+
+    int search(ItemType &itemOut, const ItemType &key, int h(const ItemType &key, int size)) const;
+};
+
+/*~*~*~*
+   Insert an item into the hash table
+   It does not reject duplicates
+*~**/
+template<class ItemType>
+bool HashTable<ItemType>::insert(const ItemType &itemIn, int h(const ItemType &key, int size)) {
+    if (count == hashSize)
+        return false;
+
+    int pos = h(itemIn, hashSize);
+    int collisions = 0;
+    while (hashAry[pos].getOccupied() == 1) {
+        ++pos;
+        ++collisions;
+        pos = pos % hashSize;
+    }
+    hashAry[pos].setItem(itemIn);
+    hashAry[pos].setOccupied(1);
+    hashAry[pos].setNoCollisions(collisions);
+    count++;
+
+    return true;
+}
+
+/*~*~*~*
+   Removes the item with the matching key from the hash table
+   if found:
+     - copies data in the hash node to itemOut
+     - replaces data in the hash node with an empty record (occupied = -1: deleted!)
+     - returns true
+   if not found:
+     - returns false
+*~**/
+template<class ItemType>
+bool HashTable<ItemType>::remove(ItemType &itemOut, const ItemType &key, int h(const ItemType &key, int size)) {
+    int pos = h(key, hashSize);
+    for (int collisions = 0; collisions < count; collisions++) {
+        if (hashAry[pos].getOccupied() == 1 && hashAry[pos].getItem() == key) {
+            itemOut = hashAry[pos].getItem();
+            // -1 means freed
+            hashAry[pos].setOccupied(-1);
+            count--;
+            return true;
+        }
+        pos = (pos + 1) % hashSize;
+    }
+    return false;
+}
+
+/*~*~*~*
+   hash search - linear probe
+   if found:
+      - copy data to itemOut
+      - returns the number of collisions for this key
+   if not found, returns -1
+*~**/
+template<class ItemType>
+int HashTable<ItemType>::search(ItemType &itemOut, const ItemType &key, int h(const ItemType &key, int size)) const {
+    int pos = h(key, hashSize);
+    for (int collisions = 0; collisions < count; collisions++) {
+        if (hashAry[pos].getOccupied() == 0) return -1;
+        if (hashAry[pos].getOccupied() == 1 && hashAry[pos].getItem() == key) {
+            itemOut = hashAry[pos].getItem();
+            return hashAry[pos].getNoCollisions();
+        }
+        pos = (pos + 1) % hashSize;
+    }
+    return -1;
+}
+
+#endif // HASHTABLE_H_

06-hash-tables/Student.cpp

@@ -0,0 +1,16 @@
+// Implementation file for the Student class
+// Written By: Iurii Tatishchev
+
+#include <string>
+#include "Student.h"
+
+/*~*~*~*
+ Hash function: takes the key and returns the index in the hash table
+ *~**/
+int key_to_index(const Student &key, int size) {
+    string k = key.name;
+    int sum = 0;
+    for (int i = 0; k[i]; i++)
+        sum += k[i];
+    return sum % size;
+};

06-hash-tables/Student.h

@@ -0,0 +1,46 @@
+// Specification file for the Student class
+// Modified by: Iurii Tatishchev
+// IDE: CLion
+
+#ifndef STUDENT_H
+#define STUDENT_H
+
+using std::string;
+
+class Student; // Forward Declaration
+
+// Function Prototypes for friend functions
+int key_to_index(const Student &key, int size);
+
+class Student {
+private:
+    double gpa;
+    string name;
+
+public:
+    Student() {
+        name = "";
+        gpa = -1;
+    }  // Constructor
+    Student(string n, double g) {
+        name = n;/* Write your code here */
+        gpa = g;
+    }  // Overloaded Constructor
+
+    // Setters and getters
+    void setName(string n) { name = n; }
+
+    void setGpa(double g) { gpa = g; }
+
+    string getName() const { return name; }
+
+    double getGpa() const { return gpa; }
+
+    // Overloaded operators
+    bool operator==(const Student& other) { return name == other.name; }
+
+    // friend functions
+    friend int key_to_index(const Student& key, int size);
+};
+
+#endif

06-hash-tables/main.cpp

@@ -0,0 +1,137 @@
+/*
+ CIS 22C
+ Hash Tables ADT - Linear Probe
+ Written By: Iurii Tatishchev
+ Reviewed & Modified by: Iurii Tatishchev
+ */
+
+#include <iostream>
+#include "HashTable.h"
+#include "Student.h"
+
+using namespace std;
+
+void buildHash(HashTable<Student> &hash);
+
+void searchManager(const HashTable<Student> &hash);
+
+void deleteManager(HashTable<Student> &hash);
+
+void insertManager(HashTable<Student> &hash);
+
+int main() {
+    HashTable<Student> hash;
+
+    buildHash(hash);
+    cout << "Load Factor: " << hash.getLoadFactor() << endl;
+    searchManager(hash);
+    deleteManager(hash);
+    insertManager(hash);
+
+    return 0;
+}
+
+/* **************************************************
+This function builds a hash table with data from an array
+It calls the insert() function that inserts the new data at the right location in the hash table.
+************************************************** */
+void buildHash(HashTable<Student> &hash) {
+
+    Student list[] = {{"Tom",   2.5},
+                      {"Bob",   3.2},
+                      {"Boc",   3.2},
+                      {"Linda", 3.9},
+                      {"Tim",   4.0},
+                      {"Vic",   3.9},
+                      {"Ann",   3.5},
+                      {"Dylan", 3.1},
+                      {"obB",   2.2},
+                      {"oBb",   3.7},
+                      {"Bbo",   3.3},
+                      {"bBo",   3.9},
+                      {"boB",   2.3},
+                      {"",      0}};
+
+    for (int i = 0; list[i].getName() != ""; i++) {
+        hash.insert(list[i], key_to_index);
+    }
+
+}
+
+/* **************************************************
+This function searches a hash table with user provided data.
+It calls the hash search function in a loop.
+To stop searching enter "#"
+************************************************** */
+void searchManager(const HashTable<Student> &hash) {
+    cout << endl << "~*~ Test Search ~*~" << endl;
+    cout << "Enter name [# to stop searching]:" << endl;
+    string name;
+    getline(cin, name);
+    while (name != "#") {
+        Student item;
+        item.setName(name);
+        int nc = hash.search(item, item, key_to_index);
+        if (nc != -1) {
+            cout << item.getName() << " " << item.getGpa() << " (" << nc << " collisions!)" << endl;
+        } else {
+            cout << name << " not found!" << endl;
+        }
+        getline(cin, name);
+    }
+    cout << "Load Factor: " << hash.getLoadFactor() << endl;
+}
+
+/* **************************************************
+This function deletes user provided data data from a hash table
+It calls the hash delete function in a loop.
+To stop deleting enter "#"
+************************************************** */
+void deleteManager(HashTable<Student> &hash) {
+    cout << endl << "~*~ Test Delete ~*~" << endl;
+    cout << "Enter name [# to stop deleting]:" << endl;
+    string name;
+    getline(cin, name);
+    while (name != "#") {
+        Student itemOut;
+        itemOut.setName(name);
+        if (hash.remove(itemOut, itemOut, key_to_index)) {
+            cout << itemOut.getName() << " " << itemOut.getGpa() << " - deleted!" << endl;
+        } else {
+            cout << name << " not found!" << endl;
+        }
+        getline(cin, name);
+    }
+    cout << "Load Factor: " << hash.getLoadFactor() << endl;
+}
+
+/* **************************************************
+This function inserts user provided data into the hash table
+It rejects duplicates.
+It calls hash search and hash insert in a loop.
+To stop getting user input enter "#"
+************************************************** */
+void insertManager(HashTable<Student> &hash) {
+    cout << endl << "~*~ Test Insert - reject duplicates ~*~" << endl;
+    cout << "Enter name [# to stop reading]:" << endl;
+    string name;
+    getline(cin, name);
+    while (name != "#") {
+        Student found;
+        found.setName(name);
+        if (hash.search(found, found, key_to_index) != -1) {
+            cout << "Duplicate key: " << found.getName() << " - rejected!" << endl;
+        } else {
+            cout << "Enter gpa:" << endl;
+            double gpa;
+            cin >> gpa;
+            cin.ignore();
+            Student newStudent(name, gpa);
+            hash.insert(newStudent, key_to_index);
+            cout << name << " - inserted (" << hash.search(found, newStudent, key_to_index) << " collisions)" << endl;
+        }
+        cout << "Enter name [# to stop reading]:" << endl;
+        getline(cin, name);
+    }
+    cout << "Load Factor: " << hash.getLoadFactor() << endl;
+}

07-heaps/.idea/.gitignore

@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

07-heaps/.idea/.name

@@ -0,0 +1 @@
+07_heaps

07-heaps/.idea/07-heaps.iml

@@ -0,0 +1,2 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module classpath="CMake" type="CPP_MODULE" version="4" />

07-heaps/.idea/inspectionProfiles/Project_Default.xml

@@ -0,0 +1,6 @@
+<component name="InspectionProjectProfileManager">
+  <profile version="1.0">
+    <option name="myName" value="Project Default" />
+    <inspection_tool class="Eslint" enabled="true" level="WARNING" enabled_by_default="true" />
+  </profile>
+</component>

07-heaps/.idea/misc.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CMakePythonSetting">
+    <option name="pythonIntegrationState" value="YES" />
+  </component>
+  <component name="CMakeWorkspace" PROJECT_DIR="$PROJECT_DIR$" />
+</project>

07-heaps/.idea/modules.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/07-heaps.iml" filepath="$PROJECT_DIR$/.idea/07-heaps.iml" />
+    </modules>
+  </component>
+</project>

07-heaps/.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/.." vcs="Git" />
+  </component>
+</project>

07-heaps/CMakeLists.txt

@@ -0,0 +1,7 @@
+cmake_minimum_required(VERSION 3.28)
+project(07_heaps)
+
+set(CMAKE_CXX_STANDARD 20)
+
+add_executable(07_heaps main.cpp
+)

07-heaps/Customer.cpp

@@ -0,0 +1,13 @@
+/* *~*~*
+Implementation file for the Customer class
+Written By: Iurii Tatishchev
+Changed by: Iurii Tatishchev
+IDE: CLion
+*~**/
+#include <iostream>
+#include <string>
+#include "Customer.h"
+
+using namespace std;
+
+/* Write your code here */

07-heaps/Customer.h

@@ -0,0 +1,46 @@
+/* *~*~*
+  Specification file for the Customer class
+  Written By: Iurii Tatishchev
+  Changed by: Iurii Tatishchev
+  IDE: CLion
+  *~**/
+#ifndef CUSTOMER_H_
+#define CUSTOMER_H_
+
+#include <utility>
+
+using std::string, std::ostream;
+
+class Customer; // Forward Declaration
+
+class Customer {
+private:
+    int year;
+    int mileage;
+    int seq;
+    string name;
+
+    int priority;
+    int serial;
+
+public:
+    Customer() : year(0), mileage(0), seq(0), name("") {};
+
+    Customer(int y, int m, int s, string n) : year(y), mileage(m), seq(s), name(std::move(n)) {
+        priority = calcPriority();
+        serial = calcSerial();
+    };
+
+    int calcPriority() { return mileage / 1000 + year - seq; }
+
+    int getSerial() const { return serial; }
+
+    int calcSerial() { return priority * 100 + (100 - seq); }
+
+    friend ostream &operator<<(ostream &os, const Customer &c) {
+        os << c.year << " " << c.mileage << " (" << c.getSerial() << ") [" << c.name << "]";
+        return os;
+    }
+};
+
+#endif

07-heaps/Heap.h

@@ -0,0 +1,135 @@
+/* *~*~*
+Specification file for the Heap class: min- or max-heap of integers
+Written By: Iurii Tatishchev
+Changed by: Iurii Tatishchev
+IDE: CLion
+*~**/
+
+#ifndef HEAP_H_
+#define HEAP_H_
+
+template<typename T>
+class Heap {
+private:
+    T *heapAry;
+    int heapSize;
+    int count;
+
+    void _reHeapUp(int lastndx, int (compareFunc)(const T&, const T&));
+
+    void _reHeapDown(int rootndx, int (compareFunc)(const T&, const T&));
+
+    int _findParent(int index) { return (index <= 0) ? (-1) : (index - 1) / 2; }
+
+    int _findLeftChild(int index) { return (2 * index + 1 >= count) ? (-1) : (2 * index + 1); }
+
+    int _findRightChild(int index) { return (2 * index + 2 >= count) ? (-1) : (2 * index + 2); }
+
+public:
+    Heap() {
+        count = 0;
+        heapSize = 128;
+        heapAry = new T[heapSize];
+    }
+
+    Heap(int n) {
+        count = 0;
+        heapSize = n;
+        heapAry = static_cast<int *>(new T[heapSize]);
+    }
+
+    ~Heap() { delete[] heapAry; }
+
+    int getCount() const { return count; }
+
+    int getSize() const { return heapSize; }
+
+    bool isEmpty() const { return count == 0; }
+
+    bool isFull() const { return count == heapSize; }
+
+    bool insertHeap(T &itemIn, int (compareFunc)(const T&, const T&));
+
+    bool deleteHeap(T &itemOut, int (compareFunc)(const T&, const T&));
+
+};
+
+template <typename T>
+void Heap<T>::_reHeapUp(int lastndx, int (compareFunc)(const T&, const T&)) {
+
+    // base case, newElement is heap's root
+    if (lastndx == 0) return;
+
+    int parentIndex = _findParent(lastndx);
+    // base case, newElement satisfies heap property
+    // min heap - child not less than parent
+    // max heap - child not greater than parent
+    if (compareFunc(heapAry[lastndx], heapAry[parentIndex]) != -1) return;
+
+    // swap and continue recursing
+    std::swap(heapAry[lastndx], heapAry[parentIndex]);
+    _reHeapUp(parentIndex, compareFunc);
+}
+
+/* *~*~*
+ The private member function _reHeapDown rearranges the heap after delete by moving the
+ data in the root down to the correct location in the heap
+ *~**/
+template <typename T>
+void Heap<T>::_reHeapDown(int rootdex, int (compareFunc)(const T&, const T&)) {
+    int maxChildIndex = -1;
+
+    int left = _findLeftChild(rootdex);
+    int right = _findRightChild(rootdex);
+
+    // if there is a left child
+    if (left != -1) {
+        // if there is a right child that is
+        // min heap - less than the left child
+        // max heap - greater than the left child
+        if (right != -1 && compareFunc(heapAry[right], heapAry[left]) == -1) maxChildIndex = right;
+        else maxChildIndex = left;
+    }
+
+    // base case, heap property satisfied
+    // min heap - children greater than parent
+    // max heap - children less than parent
+    if (maxChildIndex == -1 || compareFunc(heapAry[rootdex], heapAry[maxChildIndex]) == -1) return;
+
+    // swap and continue recursing
+    std::swap(heapAry[rootdex], heapAry[maxChildIndex]);
+    _reHeapDown(maxChildIndex, compareFunc);
+}
+
+/* *~*~*
+ The public member function insertHeap inserts a new item into a heap.
+ It calls _reheapUp.
+ *~**/
+template <typename T>
+bool Heap<T>::insertHeap(T& newItem, int (compareFunc)(const T&, const T&)) {
+    if (isFull()) return false;
+
+    heapAry[count] = newItem;
+    _reHeapUp(count, compareFunc);
+    count++;
+
+    return true;
+}
+
+/* *~*~*
+ The public member function deleteHeap deletes the root of the heap and
+ passes back the root's data. It calls _reheapDown.
+ *~**/
+template <typename T>
+bool Heap<T>::deleteHeap(T& returnItem, int (compareFunc)(const T&, const T&)) {
+    if (isEmpty()) return false;
+
+    returnItem = heapAry[0];
+    heapAry[0] = heapAry[count - 1];
+    count--;
+    _reHeapDown(0, compareFunc);
+
+    return true;
+}
+
+#endif

07-heaps/main.cpp

@@ -0,0 +1,105 @@
+/*
+  Heaps - ADT
+
+  This program will read data about overbooked customers,
+  find their priority and serial numbers, build a heap, then display
+  customers in priority sequence
+
+  Written By: Iurii Tatishchev
+  Changed By: Iurii Tatishchev
+  IDE: CLion
+*/
+
+#include <iostream>
+#include <fstream>
+#include <string>
+#include "Customer.h"
+#include "Heap.h"
+
+using namespace std;
+
+// Function Prototypes
+int compareCustomer(const Customer &c1, const Customer &c2);
+
+void processArrival(Heap<Customer> &heap, ifstream &inputFile, int seq);
+
+void processServe(Heap<Customer> &heap);
+
+void displayRejected(Heap<Customer> &heap);
+
+int main() {
+    // Get input file name
+    string inputFileName;
+    cout << "Input file name: ";
+    getline(cin, inputFileName);
+    cout << endl;
+
+    // Open input file
+    ifstream inputFile(inputFileName);
+    if (!inputFile.good()) {
+        cerr << "Error: could not open file " << inputFileName << "\n";
+        return 1;
+    }
+
+    // Create heap
+    Heap<Customer> heap;
+
+    // Process input file
+    char command;
+    int seq = 1;
+    while (inputFile >> command) {
+        switch (command) {
+            case 'A':
+                processArrival(heap, inputFile, seq);
+                seq++;
+                break;
+            case 'S':
+                processServe(heap);
+                break;
+            default:
+                cerr << "Error: invalid command " << command << "\n";
+                return 1;
+        }
+    }
+    cout << "Served overbooked customers: " << seq - heap.getCount() - 1 << "\n\n";
+
+    // Display rejected customers
+    int rejectedCustomers = heap.getCount();
+    displayRejected(heap);
+    cout << "Rejected overbooked customers: " << rejectedCustomers << "\n";
+
+    return 0;
+}
+
+int compareCustomer(const Customer &c1, const Customer &c2) {
+    if (c1.getSerial() < c2.getSerial()) return 1;
+    if (c1.getSerial() > c2.getSerial()) return -1;
+    return 0;
+}
+
+void processArrival(Heap<Customer> &heap, ifstream &inputFile, int seq) {
+    int years, mileage;
+    string name;
+    inputFile >> years >> mileage;
+    getline(inputFile >> ws, name);
+    Customer customer(years, mileage, seq, name);
+    heap.insertHeap(customer, compareCustomer);
+}
+
+void processServe(Heap<Customer> &heap) {
+    if (heap.isEmpty()) {
+        cout << "Heap is empty" << endl;
+        return;
+    }
+    Customer customer;
+    heap.deleteHeap(customer, compareCustomer);
+    cout << customer << endl;
+}
+
+void displayRejected(Heap<Customer> &heap) {
+    Customer customer;
+    while (!heap.isEmpty()) {
+        heap.deleteHeap(customer, compareCustomer);
+        cout << customer << endl;
+    }
+}

07-heaps/overbooked.txt

@@ -0,0 +1,30 @@
+A 5 53000 Robert Hill
+A 3 89000 Amanda Trapp
+A 3 90000 Jonathan Nguyen
+A 5 56000 Tom Martin
+A 1 21000 Mary Lou Gilley
+S
+S
+S
+A 3 89000 Bob Che
+A 7 72000 Warren Rexroad
+A 2 65000 Vincent Gonzales
+A 3 34000 Paula Hung
+S 
+S
+A 6 21000 Lou Masson
+A 4 42000 Steve Chu
+A 3 99000 Linda Lee
+S
+S
+A 3 69000 Dave Lightfoot
+A 3 83000 Daniel Oh
+A 5 50000 Sue Andrews
+A 2 73000 Joanne Brown
+S
+A 7 96000 Paul Ng
+S
+A 5 53000 Steven Chen
+A 2 65000 Vladimir Johnson
+S
+A 7 72000 Peter Edwards

07-heaps/overbooked_1.txt

@@ -0,0 +1,21 @@
+A 5 53000 Robert Hill
+A 3 89000 Amanda Trapp
+A 3 90000 Jonathan Nguyen
+A 5 56000 Tom Martin
+A 1 21000 Mary Lou Gilley
+A 3 89000 Bob Che
+A 7 72000 Warren Rexroad
+A 6 21000 Lou Masson
+A 2 65000 Vincent Gonzales
+A 3 34000 Paula Hung
+A 4 42000 Steve Chu
+A 3 99000 Linda Lee
+A 3 69000 Dave Lightfoot
+A 3 83000 Daniel Oh
+A 5 50000 Sue Andrews
+A 2 73000 Joanne Brown
+A 7 96000 Paul Ng
+A 5 53000 Steven Chen
+A 2 65000 Vladimir Johnson
+A 7 72000 Peter Edwards
+A 6 21000 Zoe Smith

07-heaps/overbooked_2.txt

@@ -0,0 +1,10 @@
+A 5 53000 Robert Hill
+A 3 89000 Amanda Trapp
+A 2 65000 Vincent Gonzales
+S
+A 3 34000 Paula Hung
+A 4 42000 Steve Chu
+S
+A 2 65000 Vladimir Johnson
+S
+A 7 72000 Warren Rexroad

07-heaps/test.txt

@@ -0,0 +1,5 @@
+A 5 53000 Robert Hill
+A 3 89000 Amanda Trapp
+A 3 90000 Jonathan Nguyen
+S
+A 5 56000 Tom Martin