money.cpp

#include <iostream>

using namespace std;

class Wallet
{
  public:
  int money;
  Wallet()
  {

  }
  void addMoney(int & money, int n)
  {
    while(n)
    {
     money++;
      n--;
    }
  }
  void getMoney(int & money, int n)
  {
    while(n)
    {
      money--;
      n--;
    }
  }
  void displayMoney(int & money)
  {
    if(money==0)
      cout<<"you have no money";
    else
      cout<<"you have "<<money<<" money";
  }
}wallet;
int main()
{
  int wallet.money=0, a, n, b=1;
  while(b)
  {
    cout<<"Press 1 if you want to add money to your wallet."<<endl;
  cout<<"Press 2 if you want to get money out of your wallet."<<endl;
  cout<<"Press 3 if you want to see hoe much money you have in your wallet."<<endl;
  cin>>a;
  switch(a)
  {
    case 1:{
             cout<<"How much money will you add?"<<endl;
             cin>>n;
             wallet.addMoney(wallet.money,n);
           }break;
    case 2:{
      cout<<"How much money do you want to get?"<<endl;
      cin>>n;
      wallet.getMoney(wallet.money,n);
    }break;
    case 3:{
      wallet.displayMoney(wallet.money);
    }break;
    default:break;
  }
    cout<<"Press 1 if you want anything else."<<endl;
    cout<<"Press 0 if you want to exit wallet."<<endl;
    cin>>b;
  }
  return 0;
}