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  1. #include <iostream>
  2. #include <string>
  3. #include <vector>
  4. using namespace std;
  5.  
  6. // ================== Bank Account ==================
  7. class BankAcc 
  8. {
  9. protected:
  10.     string acc_holder, acc_num;
  11.     double balance;
  12. public:
  13.     BankAcc(string acc_holder="", string acc_num="", double balance=0) 
  14.         : acc_holder(acc_holder), acc_num(acc_num), balance(balance) {}
  15.     void deposit(double amount) { if(amount>0) balance+=amount; }
  16.     void withdraw(double amount) { if(amount>0 && amount<=balance) balance-=amount; }
  17.     virtual void display()
  18.     {
  19.         cout<<"Holder: "<<acc_holder<<endl;
  20.         cout<<"Number: "<<acc_num<<endl;
  21.         cout<<"Balance: "<<balance<<endl;
  22.     }
  23.     string getAccHolder() { return acc_holder; }
  24.     string getAccNumber() { return acc_num; }
  25.     double getBalance() { return balance; }
  26. };
  27.  
  28. class SavingsAccount : public BankAcc
  29. {
  30.     double interestRate;
  31. public:
  32.     SavingsAccount(string acc_holder,string acc_num,double balance,double interestRate)
  33.         : BankAcc(acc_holder,acc_num,balance), interestRate(interestRate) {}
  34.     void addInterest() { balance+=balance*interestRate/100; }
  35.     void display()
  36.     {
  37.         BankAcc::display();
  38.         cout<<"Interest Rate: "<<interestRate<<"%"<<endl;
  39.     }
  40. };
  41.  
  42. // ================== Customer ==================
  43. class Customer {
  44. private:
  45.     string name;
  46.     string customerID;
  47.     vector<BankAcc*> accounts;
  48. public:
  49.     Customer(string custName, string id) : name(custName), customerID(id) {}
  50.     ~Customer() { for(auto acc : accounts) delete acc; }
  51.     void addAccount(string accHolder, string accNum, double initialBalance = 0.0) {
  52.         accounts.push_back(new BankAcc(accHolder, accNum, initialBalance));
  53.     }
  54.     void addSavingsAccount(string accHolder, string accNum, double initialBalance, double interestRate) {
  55.         accounts.push_back(new SavingsAccount(accHolder, accNum, initialBalance, interestRate));
  56.     }
  57.     void displayAllAccounts() {
  58.         cout << "\nCustomer: " << name << " (ID: " << customerID << ")\n";
  59.         for(int i=0;i<accounts.size();i++) {
  60.             cout << "\n--- Account " << i+1 << " ---\n";
  61.             accounts[i]->display();
  62.         }
  63.     }
  64.     double getTotalBalance() {
  65.         double total = 0;
  66.         for(auto acc : accounts) total += acc->getBalance();
  67.         return total;
  68.     }
  69. };
  70.  
  71. // ================== Student ==================
  72. class Student 
  73. {
  74. protected:
  75.     string name, id;
  76.     double grades[20];
  77.     int cnt=0;
  78. public:
  79.     Student(string name="",string id="") : name(name), id(id) {}
  80.     void add_grade(double g) { grades[cnt++]=g; }
  81.     double calc_avg()
  82.     {
  83.         double sum=0;
  84.         for(int i=0;i<cnt;i++) sum+=grades[i];
  85.         return cnt>0 ? sum/cnt :0;
  86.     }
  87.     virtual void display()
  88.     {
  89.         cout<<"Name: "<<name<<endl;
  90.         cout<<"ID: "<<id<<endl;
  91.         cout<<"Grades: ";
  92.         for(int i=0;i<cnt;i++) cout<<grades[i]<<" ";
  93.         cout<<endl;
  94.         cout<<"Average: "<<calc_avg()<<endl;
  95.     }
  96. };
  97.  
  98. class GraduateStudent : public Student
  99. {
  100.     string graduationProject;
  101. public:
  102.     GraduateStudent(string name,string id,string graduationProject)
  103.         : Student(name,id), graduationProject(graduationProject) {}
  104.     void display()
  105.     {
  106.         Student::display();
  107.         cout<<"Graduation Project: "<<graduationProject<<endl;
  108.     }
  109. };
  110.  
  111. // ================== Rectangle ==================
  112. class Rectangle
  113. {
  114. protected:
  115.     double length, width;
  116. public:
  117.     Rectangle(double length=0,double width=0) : length(length), width(width) {}
  118.     double calc_area() { return length*width; }
  119.     double calc_perimeter() { return 2*(length+width); }
  120.     void display()
  121.     {
  122.         cout<<"Length: "<<length<<endl;
  123.         cout<<"Width: "<<width<<endl;
  124.     }
  125. };
  126.  
  127. // ================== Shopping Cart ==================
  128. class ShoppingCart
  129. {
  130. protected:
  131.     vector<pair<string,double>> items;
  132.     double total=0;
  133. public:
  134.     ShoppingCart() : total(0) {}
  135.     void add(string name,double price)
  136.     {
  137.         items.push_back({name,price});
  138.         total+=price;
  139.     }
  140.     void remove(string name)
  141.     {
  142.         for(int i=0;i<items.size();i++)
  143.         {
  144.             if(items[i].first==name)
  145.             {
  146.                 total-=items[i].second;
  147.                 items.erase(items.begin()+i);
  148.                 break;
  149.             }
  150.         }
  151.     }
  152.     double calc() { return total; }
  153.     virtual void show()
  154.     {
  155.         cout<<"Total Price = "<<calc()<<endl;
  156.         cout<<"Items: ";
  157.         for(auto &it: items) cout<<it.first<<" ";
  158.         cout<<endl;
  159.     }
  160. };
  161.  
  162. class DiscountCart : public ShoppingCart
  163. {
  164.     double discountRate;
  165. public:
  166.     DiscountCart(double discountRate) : discountRate(discountRate) {}
  167.     double calc()
  168.     {
  169.         return ShoppingCart::calc()*(1-discountRate/100);
  170.     }
  171.     void show()
  172.     {
  173.         cout<<"Total Price after discount = "<<calc()<<endl;
  174.         cout<<"Items: ";
  175.         for(auto &it: items) cout<<it.first<<" ";
  176.         cout<<endl;
  177.         cout<<"Discount Rate: "<<discountRate<<"%"<<endl;
  178.     }
  179. };
  180.  
  181. // ================== Phone ==================
  182. class Phone
  183. {
  184. protected:
  185.     string brand, model;
  186.     int storage, freestorage, battery;
  187. public:
  188.     Phone(string brand,string model,int storage)
  189.         : brand(brand), model(model), storage(storage), freestorage(storage), battery(100) {}
  190.     void install(int size) { if(size<=freestorage) freestorage-=size; else cout<<"Not enough storage"<<endl; }
  191.     void usebatt(int amt) { battery=max(0,battery-amt); }
  192.     void charge() { battery=100; }
  193.     virtual void show()
  194.     {
  195.         cout<<"Brand: "<<brand<<endl;
  196.         cout<<"Model: "<<model<<endl;
  197.         cout<<"Storage: "<<storage<<endl;
  198.         cout<<"Free Storage: "<<freestorage<<endl;
  199.         cout<<"Battery: "<<battery<<endl;
  200.     }
  201. };
  202.  
  203. class Smartphone : public Phone
  204. {
  205.     string os;
  206. public:
  207.     Smartphone(string brand,string model,int storage,string os)
  208.         : Phone(brand,model,storage), os(os) {}
  209.     void show()
  210.     {
  211.         Phone::show();
  212.         cout<<"OS: "<<os<<endl;
  213.     }
  214. };
  215.  
  216. // ================== Temperature ==================
  217. class Temperature
  218. {
  219. protected:
  220.     float cel;
  221. public:
  222.     Temperature(float cel) : cel(cel) {}
  223.     float kel() { return cel+273.15; }
  224.     float fahr() { return cel*9/5+32; }
  225.     void show()
  226.     {
  227.         cout<<"Celsius: "<<cel<<endl;
  228.         cout<<"Fahrenheit: "<<fahr()<<endl;
  229.         cout<<"Kelvin: "<<kel()<<endl;
  230.     }
  231. };
  232.  
  233. // ================== Car ==================
  234. class Car 
  235. {
  236. protected:
  237.     string make, model;
  238.     int year, mileage;
  239. public:
  240.     Car(string make, string model, int year, int mileage)
  241.         : make(make), model(model), year(year), mileage(mileage) {}
  242.     void updateMileage(int newMileage) { if (newMileage >= mileage) mileage = newMileage; }
  243.     virtual void display() { cout << make << " " << model << " " << year << " " << mileage << " km\n"; }
  244.     bool needsService(int threshold) { return mileage >= threshold; }
  245. };
  246.  
  247. class ElectricCar : public Car 
  248. {
  249.     int battery; 
  250. public:
  251.     ElectricCar(string make, string model, int year, int mileage, int battery)
  252.         : Car(make, model, year, mileage), battery(battery) {}
  253.     void display() { Car::display(); cout << "Battery: " << battery << "%\n"; }
  254.     void charge() { battery = 100; cout << "Battery fully charged!\n"; }
  255. };
  256.  
  257. // ================== Book ==================
  258. class Book 
  259. {
  260. protected:
  261.     string title, author, isbn;
  262.     bool available;
  263. public:
  264.     Book(string title, string author, string isbn) 
  265.         : title(title), author(author), isbn(isbn), available(true) {}
  266.     void checkOut() { if (available) available = false; }
  267.     void returnBook() { if (!available) available = true; }
  268.     virtual void display() 
  269.     { cout << "Title: " << title << ", Author: " << author << ", ISBN: " << isbn
  270.            << ", Availability: " << (available ? "Available" : "Checked out") << "\n"; }
  271. };
  272.  
  273. class EBook : public Book 
  274. {
  275.     string fileFormat;
  276. public:
  277.     EBook(string title, string author, string isbn, string format)
  278.         : Book(title, author, isbn), fileFormat(format) {}
  279.     void display() { Book::display(); cout << "File format: " << fileFormat << "\n"; }
  280. };
  281.  
  282. // ================== Employee ==================
  283. class Employee 
  284. {
  285. protected:
  286.     string name;
  287.     int employeeID;
  288.     string department;
  289.     double salary;
  290. public:
  291.     Employee(string name, int id, string dept, double sal)
  292.         : name(name), employeeID(id), department(dept), salary(sal) {}
  293.     void updateSalary(double newSalary) { if (newSalary > 0) salary = newSalary; }
  294.     virtual void display()
  295.     { cout << "Name: " << name << ", Employee ID: " << employeeID
  296.            << ", Department: " << department << ", Salary: $" << salary << "\n"; }
  297.     double calculateBonus() { return salary * 0.10; }
  298. };
  299.  
  300. class Manager : public Employee 
  301. {
  302.     int teamSize;
  303. public:
  304.     Manager(string name, int id, string dept, double sal, int team)
  305.         : Employee(name, id, dept, sal), teamSize(team) {}
  306.     void display() { Employee::display(); cout << "Team Size: " << teamSize << "\n"; }
  307. };
  308.  
  309. // ================== Dog ==================
  310. class Animal 
  311. {
  312. protected:
  313.     string name;
  314.     int age;
  315. public:
  316.     Animal(string name, int age) : name(name), age(age) {}
  317.     virtual void speak() { cout << "Animal sound" << endl; }
  318. };
  319.  
  320. class Dog : public Animal
  321. {
  322.     string breed;
  323. public:
  324.     Dog(string name, string breed, int age) : Animal(name, age), breed(breed) {}
  325.     void speak() { cout << name << " WOOF WOOF" << endl; }
  326.     int human_age() { return 7*age; }
  327.     void display() 
  328.     {
  329.         cout << "Name: " << name << endl;
  330.         cout << "Breed: " << breed << endl;
  331.         cout << "Age: " << age << " years" << endl;
  332.         cout << "Human age: " << human_age() << " years" << endl;
  333.     }
  334. };
  335. // ================== Main ==================
  336. int main()
  337. {
  338.     cout<<"==== Bank Account ===="<<endl;
  339.     SavingsAccount acc("Ali","12345",1000,5);
  340.     acc.addInterest();
  341.     acc.display();
  342.  
  343.     cout<<"\n==== Student ===="<<endl;
  344.     GraduateStudent s("Karim","333","AI Thesis");
  345.     s.add_grade(95);
  346.     s.add_grade(88);
  347.     s.display();
  348.  
  349.     cout<<"\n==== Rectangle ===="<<endl;
  350.     Rectangle r(5,5);
  351.     r.display();
  352.     cout<<"Area: "<<r.calc_area()<<endl;
  353.  
  354.     cout<<"\n==== Shopping Cart ===="<<endl;
  355.     DiscountCart cart(10);
  356.     cart.add("Milk",20);
  357.     cart.add("Bread",10);
  358.     cart.show();
  359.  
  360.     cout<<"\n==== Phone ===="<<endl;
  361.     Smartphone ph("Samsung","A51",128,"Android");
  362.     ph.install(2);
  363.     ph.usebatt(20);
  364.     ph.show();
  365.  
  366.     cout<<"\n==== Temperature ===="<<endl;
  367.     Temperature temp(25);
  368.     temp.show();
  369.  
  370.     cout<<"\n==== Car ===="<<endl;
  371.     ElectricCar tesla("Tesla","Model 3",2022,15000,80);
  372.     tesla.display();
  373.     tesla.charge();
  374.     tesla.updateMileage(20000);
  375.     cout << (tesla.needsService(30000) ? "Needs service\n" : "No service needed\n");
  376.  
  377.     cout<<"\n==== Book ===="<<endl;
  378.     EBook ebook1("Digital Fortress","Dan Brown","978-031233516","PDF");
  379.     ebook1.display();
  380.     ebook1.checkOut();
  381.     ebook1.display();
  382.  
  383.     cout<<"\n==== Employee ===="<<endl;
  384.     Manager mgr("Sara Ali",201,"IT",8000,5);
  385.     mgr.display();
  386.     cout<<"Annual Bonus: $"<<mgr.calculateBonus()<<endl;
  387.  
  388.     cout << "\n==== Dog ====" << endl;
  389.     Dog dog1("Rex", "German Shepherd", 3);
  390.     dog1.speak();
  391.     dog1.display();
  392.  
  393.     cout<<"\n==== Customer System ===="<<endl;
  394.     Customer customer1("Ahmed Mohamed", "CUST001");
  395.     customer1.addAccount("Ahmed Mohamed", "ACC1001", 5000.00);
  396.     customer1.addSavingsAccount("Ahmed Mohamed", "ACC1002", 10000.00, 5.0);
  397.     customer1.addAccount("Ahmed Mohamed", "ACC1003", 7500.00);
  398.     customer1.displayAllAccounts();
  399.     cout<<"Total Balance: $"<<customer1.getTotalBalance()<<endl;
  400. }
Success #stdin #stdout 0.01s 5288KB
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==== Bank Account ====
Holder: Ali
Number: 12345
Balance: 1050
Interest Rate: 5%

==== Student ====
Name: Karim
ID: 333
Grades: 95 88 
Average: 91.5
Graduation Project: AI Thesis

==== Rectangle ====
Length: 5
Width: 5
Area: 25

==== Shopping Cart ====
Total Price after discount = 27
Items: Milk Bread 
Discount Rate: 10%

==== Phone ====
Brand: Samsung
Model: A51
Storage: 128
Free Storage: 126
Battery: 80
OS: Android

==== Temperature ====
Celsius: 25
Fahrenheit: 77
Kelvin: 298.15

==== Car ====
Tesla Model 3 2022 15000 km
Battery: 80%
Battery fully charged!
No service needed

==== Book ====
Title: Digital Fortress, Author: Dan Brown, ISBN: 978-031233516, Availability: Available
File format: PDF
Title: Digital Fortress, Author: Dan Brown, ISBN: 978-031233516, Availability: Checked out
File format: PDF

==== Employee ====
Name: Sara Ali, Employee ID: 201, Department: IT, Salary: $8000
Team Size: 5
Annual Bonus: $800

==== Dog ====
Rex WOOF WOOF
Name: Rex
Breed: German Shepherd
Age: 3 years
Human age: 21 years

==== Customer System ====

Customer: Ahmed Mohamed (ID: CUST001)

--- Account 1 ---
Holder: Ahmed Mohamed
Number: ACC1001
Balance: 5000

--- Account 2 ---
Holder: Ahmed Mohamed
Number: ACC1002
Balance: 10000
Interest Rate: 5%

--- Account 3 ---
Holder: Ahmed Mohamed
Number: ACC1003
Balance: 7500
Total Balance: $22500
https://ideone.com/1eqUlo
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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