Question

Write a C+OOP program that simulates a vending machine. The program should define at least two classes. Less than two classes will result in 20 points deduction. (30 points) One must be general vending machine (50 points) The other can be either vending machine of soda, or vending machine of snack. It must be a subclass of above general machine These vending machines should have following components and functions e Coin slot o Allow adding coins o Display total coin amount (in cents or dollars) Minimum requirement: enable quarter dropping Merchandise selection pad o One item each transaction o Minimum: five items for selection Main panel o Display the status of the transaction, such as balance of deposited fund, what have been purchased, what remain for sale, etc o Display erro messages Your program must utilizes at least two of following three syntactical elements loop e recursion e function Missing anyone will cause deduction of 10 points. In addition, your program must implement following three major OOP features in C++: Encapsulation Inheritance Code separation (between definition and implementation) e Missing of anyone will result in deduction of 15 points. The adoption of polymorphism (more specifically dynamic binding) is encouraged but not required

Answer 1

C++ PROGRAM:

#include <iostream>

#include <map>

using namespace std;
enum stypes
{
GRAPES =1,
STRABERRY=2,
SPRITE= 3,
MANGO = 4,
BLACKBERRY =5
};
class VendingMachine
{
private:
int coinAmount;
map <int, int> sodaTypes;
map <int, int > itemsCount;
public:
VendingMachine();
void setCoinAmount(int amount);
double getCoinAmount();
map <int,int> getSodaTypes();
map <int,int> eachMaxItemsCount();
void showItems();
void displayErrorMessage(string);
~VendingMachine();
  
};
VendingMachine :: VendingMachine()
{
sodaTypes[1]=5;
sodaTypes[2]=6;
sodaTypes[3]=7;
sodaTypes[4]=6;
sodaTypes[5]=10;
itemsCount[1]=20;
itemsCount[2]=20;
itemsCount[3]=20;
itemsCount[4]=20;
itemsCount[5]=20;
coinAmount=0.0;
}
map <int,int> VendingMachine :: eachMaxItemsCount()
{
return itemsCount;
}
map <int,int> VendingMachine:: getSodaTypes()
{
return sodaTypes;
}
void VendingMachine :: showItems()
{
cout << " Types of soda " <<endl;
cout << " 1. GRAPES " <<endl;
cout << " 2. STRABERRY " <<endl;
cout << " 3. SPRITE " <<endl;
cout << " 4. MANGO " <<endl;
cout << " 5. BLACKBERRY " <<endl;
}
double VendingMachine :: getCoinAmount()
{
return coinAmount;
}
void VendingMachine :: setCoinAmount(int amount)
{
coinAmount += amount;
}
void VendingMachine :: displayErrorMessage(string msg)
{
cout << "Erro Message : "<<msg<<endl;
}
VendingMachine :: ~VendingMachine()
{
}
class Soda : public VendingMachine
{
int item;
int price;
map <int,int > itemsCount;
map <int,int> types;
public:
Soda();
void displayCoinAmount();
bool enableQuater();
void selectionPad();
void addCoins();
void statusTransaction(bool);
};
Soda :: Soda()
{
}
void Soda :: addCoins()
{
cout << "\n Please Add Coins : ";
cin >> price;
}
void Soda :: displayCoinAmount()
{
cout << "\n Total Coin Amount : "<< getCoinAmount()<<endl;
}
void Soda :: statusTransaction(bool status)
{
if(status)
{
cout << "Soda is Dispached ... !" <<endl;
  
if(item == 1)
{
cout << " Taken Item : GRAPES Soda "<<endl;

}
else if(item == 2)
cout << " Taken Item : STRABERRY Soda "<<endl;
else if(item == 3)
cout << " Taken Item : SPRITE Soda "<<endl;
else if(item == 4)
cout << " Taken Item : MANGO Soda "<<endl;
else if(item == 1)
cout << " Taken Item : BLACKBERRY Soda "<<endl;
cout << "Balace Deposited amount : " << price - types[item] <<endl;
cout << "Remain Items for Sale : " <<endl;
cout << " GRAPES Soda "<<itemsCount[1]<<endl;
cout << " STRABERRY Soda "<<itemsCount[2]<<endl;
cout << " SPRITE Soda "<<itemsCount[3]<<endl;
cout << " MANGO Soda "<<itemsCount[4]<<endl;
cout << " BLACKBERRY Soda "<<itemsCount[5]<<endl;
}
}
bool Soda :: enableQuater()
{
if(itemsCount[item] == 0)
return false;
--itemsCount[item];
setCoinAmount(price);
return true;
}

void Soda :: selectionPad()
{
types = getSodaTypes();
itemsCount= eachMaxItemsCount();
cout << GRAPES << "" << types[2]<<endl;
addCoins();
cout << "\nSelect Item which you need " <<endl;
cin >> item;
bool status;
for(int i=1;i<6;i++)
{
if(i== item)
{
if(price < types[item] )
displayErrorMessage("Insufficent coins inserted...");
else if(itemsCount[item] == 0)
displayErrorMessage("Item is Over...");
else
{
status = enableQuater();
statusTransaction(status);
}
}
}

}

int main()
{
  
Soda obj;

obj.showItems();
obj.selectionPad();

return 0;
}