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  1. #include <iostream>
  2. #include <string>
  3. #include <vector>
  4. using namespace std;
  5. // 1️⃣ Bank Account
  6. class BankAcc 
  7. {
  8.      protected:
  9.     string acc_holder, acc_num;
  10.     double balance;
  11.     public:
  12.     BankAcc(string acc_holder="", string acc_num="", double balance=0) 
  13.         : acc_holder(acc_holder), acc_num(acc_num), balance(balance) {}
  14.     void deposit(double amount) { if(amount>0) balance+=amount; }
  15.     void withdraw(double amount) { if(amount>0 && amount<=balance) balance-=amount; }
  16.     virtual void display()
  17.     {
  18.         cout<<"Holder: "<<acc_holder<<endl;
  19.         cout<<"Number: "<<acc_num<<endl;
  20.         cout<<"Balance: "<<balance<<endl;
  21.     }
  22. };
  23. class SavingsAccount : public BankAcc
  24. {
  25.     double interestRate;
  26.     public:
  27.     SavingsAccount(string acc_holder,string acc_num,double balance,double interestRate)
  28.         : BankAcc(acc_holder,acc_num,balance), interestRate(interestRate) {}
  29.     void addInterest() { balance+=balance*interestRate/100; }
  30.     void display()
  31.     {
  32.         BankAcc::display();
  33.         cout<<"Interest Rate: "<<interestRate<<"%"<<endl;
  34.     }
  35. };
  36. // 2️⃣ Student
  37. class Student 
  38. {
  39.     protected:
  40.     string name, id;
  41.     double grades[20];
  42.     int cnt=0;
  43.     public:
  44.     Student(string name="",string id="") : name(name), id(id) {}
  45.     void add_grade(double g) { grades[cnt++]=g; }
  46.     double calc_avg()
  47.     {
  48.         double sum=0;
  49.         for(int i=0;i<cnt;i++) sum+=grades[i];
  50.         return cnt>0 ? sum/cnt :0;
  51.     }
  52.     virtual void display()
  53.     {
  54.         cout<<"Name: "<<name<<endl;
  55.         cout<<"ID: "<<id<<endl;
  56.         cout<<"Grades: ";
  57.         for(int i=0;i<cnt;i++) cout<<grades[i]<<" ";
  58.         cout<<endl;
  59.         cout<<"Average: "<<calc_avg()<<endl;
  60.     }
  61. };
  62. class GraduateStudent : public Student
  63. {
  64.     string graduationProject;
  65.     public:
  66.     GraduateStudent(string name,string id,string graduationProject)
  67.         : Student(name,id), graduationProject(graduationProject) {}
  68.     void display()
  69.     {
  70.         Student::display();
  71.         cout<<"Graduation Project: "<<graduationProject<<endl;
  72.     }
  73. };
  74. // 3️⃣ Rectangle
  75. class Rectangle
  76. {
  77.     protected:
  78.     double length, width;
  79.     public:
  80.     Rectangle(double length=0,double width=0) : length(length), width(width) {}
  81.     double calc_area() { return length*width; }
  82.     double calc_perimeter() { return 2*(length+width); }
  83.     void display()
  84.     {
  85.         cout<<"Length: "<<length<<endl;
  86.         cout<<"Width: "<<width<<endl;
  87.     }
  88. };
  89. // 4️⃣ Shopping Cart
  90. class ShoppingCart
  91. {
  92.     protected:
  93.     vector<pair<string,double>> items;
  94.     double total=0;
  95.     public:
  96.     ShoppingCart() : total(0) {}
  97.     void add(string name,double price)
  98.     {
  99.         items.push_back({name,price});
  100.         total+=price;
  101.     }
  102.     void remove(string name)
  103.     {
  104.         for(int i=0;i<items.size();i++)
  105.         {
  106.             if(items[i].first==name)
  107.             {
  108.                 total-=items[i].second;
  109.                 items.erase(items.begin()+i);
  110.                 break;
  111.             }
  112.         }
  113.     }
  114.     double calc() { return total; }
  115.     virtual void show()
  116.     {
  117.         cout<<"Total Price = "<<calc()<<endl;
  118.         cout<<"Items: ";
  119.         for(auto &it: items) cout<<it.first<<" ";
  120.         cout<<endl;
  121.     }
  122. };
  123. class DiscountCart : public ShoppingCart
  124. {
  125.     double discountRate;
  126.     public:
  127.     DiscountCart(double discountRate) : discountRate(discountRate) {}
  128.     double calc()
  129.     {
  130.         return ShoppingCart::calc()*(1-discountRate/100);
  131.     }
  132.     void show()
  133.     {
  134.         cout<<"Total Price after discount = "<<calc()<<endl;
  135.         cout<<"Items: ";
  136.         for(auto &it: items) cout<<it.first<<" ";
  137.         cout<<endl;
  138.         cout<<"Discount Rate: "<<discountRate<<"%"<<endl;
  139.     }
  140. };
  141. // 5️⃣ Phone
  142. class Phone
  143. {
  144.     protected:
  145.     string brand, model;
  146.     int storage, freestorage, battery;
  147.     public:
  148.     Phone(string brand,string model,int storage)
  149.         : brand(brand), model(model), storage(storage), freestorage(storage), battery(100) {}
  150.     void install(int size) { if(size<=freestorage) freestorage-=size; else cout<<"Not enough storage"<<endl; }
  151.     void usebatt(int amt) { battery=max(0,battery-amt); }
  152.     void charge() { battery=100; }
  153.     virtual void show()
  154.     {
  155.         cout<<"Brand: "<<brand<<endl;
  156.         cout<<"Model: "<<model<<endl;
  157.         cout<<"Storage: "<<storage<<endl;
  158.         cout<<"Free Storage: "<<freestorage<<endl;
  159.         cout<<"Battery: "<<battery<<endl;
  160.     }
  161. };
  162. class Smartphone : public Phone
  163. {
  164.     string os;
  165.     public:
  166.     Smartphone(string brand,string model,int storage,string os)
  167.         : Phone(brand,model,storage), os(os) {}
  168.     void show()
  169.     {
  170.         Phone::show();
  171.         cout<<"OS: "<<os<<endl;
  172.     }
  173. };
  174. // 6️⃣ Temperature
  175. class Temperature
  176. {
  177.     protected:
  178.     float cel;
  179.     public:
  180.     Temperature(float cel) : cel(cel) {}
  181.     float kel() { return cel+273.15; }
  182.     float fahr() { return cel*9/5+32; }
  183.     void show()
  184.     {
  185.         cout<<"Celsius: "<<cel<<endl;
  186.         cout<<"Fahrenheit: "<<fahr()<<endl;
  187.         cout<<"Kelvin: "<<kel()<<endl;
  188.     }
  189. };
  190. //////////////////////////////////////////
  191. int main()
  192. {
  193.     cout<<"==== Bank Account ===="<<endl;
  194.     SavingsAccount acc("Ali","12345",1000,5);
  195.     acc.addInterest();
  196.     acc.display();
  197.  
  198.     cout<<"\n==== Student ===="<<endl;
  199.     GraduateStudent s("Karim","333","AI Thesis");
  200.     s.add_grade(95);
  201.     s.add_grade(88);
  202.     s.display();
  203.  
  204.     cout<<"\n==== Rectangle ===="<<endl;
  205.     Rectangle r(5,5);
  206.     r.display();
  207.     cout<<"Area: "<<r.calc_area()<<endl;
  208.  
  209.     cout<<"\n==== Shopping Cart ===="<<endl;
  210.     DiscountCart cart(10);
  211.     cart.add("Milk",20);
  212.     cart.add("Bread",10);
  213.     cart.show();
  214.  
  215.     cout<<"\n==== Phone ===="<<endl;
  216.     Smartphone ph("Samsung","A51",128,"Android");
  217.     ph.install(2);
  218.     ph.usebatt(20);
  219.     ph.show();
  220.  
  221.     cout<<"\n==== Temperature ===="<<endl;
  222.     Temperature temp(25);
  223.     temp.show();
  224. }
Success #stdin #stdout 0.01s 5276KB
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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
https://ideone.com/D8QOo2
language:
C++ (gcc 8.3)
created:
7 days ago
visibility:
public

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