veningmachine.cpp

#include <iostream>
#include <string>
using namespace std;

//class drink is parent class 
class Drink {
    protected:
    string drink_name;
    double price;
    string type_of_drink;
      public:    

      Drink(string name, double p) : drink_name(name), price(p), type_of_drink("") {} //contstructor with parameters
        Drink(): drink_name(""), price(0.0), type_of_drink("") {} //these are default constructor
     double GetPrice() { return price;}  //getfunctions is created to access protected variables
     string GetType() { return type_of_drink;}
     string GetName() { return drink_name;}

};
 
class Water : public Drink //Derived Class water , it inherits from Drink class
{
    public:  //constructor
    Water():Drink("Water", 1.00) {}

void options() // Display water options to user
{
    cout<<"Choose the type of water you need:"<< endl;
    cout<<"1- Sparkling Water"<< endl;
    cout<<"2- Still Water"<<endl;
}
void setTypeOfDrink(int choice) // setting type on user choice
{
    if (choice == 1)
    {
        type_of_drink = "Sparkling Water";
    }
    else
    {
        type_of_drink = "Still Water";
    }
}
};


class Cola : public Drink { //Derived class cola
    public :
    Cola() : Drink("Cola", 1.80) {}
   
    void options()
    {
        cout<<"Please choose the type of Cola"<<endl;
        cout<<"1- Regular Cola"<<endl;
        cout<<"2- Sugar-free Cola"<<endl;
    }
    void setTypeOfDrink(int choice)
    {
        if (choice == 1)
        {
            type_of_drink = "Regular Cola";
        
        }
        else
        {
            type_of_drink = "Sugar-free Cola";
        
        }
    }
};


class IcedTea: public Drink{ //Derived Class IcedTea
    public:
    IcedTea() : Drink("Iced Tea", 2.20) {}
    
    void options()
{
    cout<<"Please choose the flavor of Iced Tea"<<endl;
    cout<<"1- Lemon Iced Tea"<<endl;
    cout<<"2- Peach Iced Tea"<<endl;
}
void setTypeOfDrink(int choice)
{
    if (choice == 1)
    {
        type_of_drink = "Lemon Iced Tea";
    }
    else
    {
        type_of_drink = "Peach Iced Tea";
    }
}
};


class DrinksVendingMachine { //class for operations perfomred in vending machine
    public:
    double money; //money available in the vending machine
    bool Ordersplaced; //flag to check if orders have been placed
   string orders[3]; //array to store orders
   double prices[3]; //array to store prices of orders
    double totalspent;

    DrinksVendingMachine() {
        money = 5.00; // initial money in the vending machine
        Ordersplaced = false;
        totalspent=0.0; 
        
    }


void showavailableDrinks(){ //Display list of drinks available
cout<<endl;
cout<<"----Available Drinks----"<<endl;
cout<<"1- Water price= 1.00 Euro"<<endl;
cout<<"2- Cola price= 1.80 Euro"<<endl;      
cout<<"3- Iced Tea price= 2.20 Euro"<<endl;
}
void showMenu(){
    cout<<endl;
    cout<<"----Main Menu----"<<endl;
    cout<<"1- Show available Drinks"<<endl;
    cout<<"2- Place Order"<<endl;
    cout<<"3- Show Total and change"<<endl;
    cout<<"4- Exit"<<endl;
    cout<<"Your Choice:";
}

void placeOrder(){ //Main Menu options
if (Ordersplaced){
    cout<<"You have already placed an order. Cannot place another one."<<endl;
    return;
    }
int DrinkChoice, typeChoice;
for(int i=0; i<3; i++){
    cout<<endl;
    cout<<"Placing order "<< (i+1) << ":" <<endl;
    showavailableDrinks();
    cout<<"Select your drink (1-3): ";
    cin>> DrinkChoice;

    double currentPrice = 0.0; //  price of the selected drink
    string currentType = ""; //  type of the selected drink
    if (DrinkChoice==1){
        Water w;
        w.options();
        cout<<"Your Choice: ";
        cin>> typeChoice;
        w.setTypeOfDrink(typeChoice);
        currentPrice = w.GetPrice(); 
        currentType = w.GetType();

    }
    else if (DrinkChoice==2){
        Cola c;
        c.options();
        cout<<"Your Choice: ";
        cin>> typeChoice;
        c.setTypeOfDrink(typeChoice);
        currentPrice = c.GetPrice(); 
        currentType = c.GetType();
    }
    else if (DrinkChoice==3){
        IcedTea it;
        it.options();
        cout<<"Your Choice: ";
        cin>> typeChoice;
        it.setTypeOfDrink(typeChoice);
        currentPrice = it.GetPrice(); 
        currentType = it.GetType();
    }
    else{
        cout<<"Invalid choice, try again."<<endl;
        i--;
        continue;
    }
    if (money >= currentPrice){ // check if the money limit has crossed or not
        money -= currentPrice;
        totalspent += currentPrice;
        orders[i] = currentType;
        prices[i] = currentPrice;
        cout<<"You have ordered: " << currentType << " for " << currentPrice << " Euro."<<endl;
    }
    else{
        cout<<"Insufficient funds for this drink. Order not placed."<<endl;
        orders[i] = "no enough money! , skipping the order....";
        prices[i] = 0.0;    

    }
}
Ordersplaced = true;// order completed flag
}


void showTotalAndChange(){ // this is to display order summary
if (!Ordersplaced){
    cout<<"No orders placed yet!"<<endl;
    return;
}
cout << "----Order Summary----" << endl;
 for (int i = 0; i < 3; i++) {
        cout << "Order " << (i + 1) << ": " << orders[i] << " - " << prices[i] << " Euro" << endl;
    }
    cout << "Total Spent: " << totalspent << " Euro" << endl;
    cout << "Remaining Money: " << money << " Euro" << endl;
}


void run(){ //Main function to run the vending machine
    int choice;
    cout<<"Welcome this your Drinks Machine!, currently you have"<< money <<" Euro"<<endl;
    do{ //main menu loop
        showMenu();
        cin>> choice;

        if (choice ==1){
            showavailableDrinks();
        }
        else if (choice ==2){
            placeOrder();
        }
        else if (choice ==3){
            showTotalAndChange();
        }
        else if (choice ==4){
            cout<<"Exiting the program. Thank you!"<<endl;
        }
        else{
            cout<<"Invalid choice, please try again."<<endl;
        }
    } while (choice !=4);   



 }
};
int main() { //Main - program start
    DrinksVendingMachine vm;// creating vending machine object
    vm.run();
    return 0;
}