#include <iostream>
#include <string>
using namespace std;
 
int main()
{ 
   double withdraw, deposit, balance, newBalance, amount;
   char ans;
   string choice;
 
   balance = 1000;
 
   cout << "Welcome to Whatever ATM!" << endl;
 
   do
   {
       cout << "\nWhat would you like to do from the following?\n"
            << "\nWithdraw from account\n"
            << "Deposit money into account\n"
            << "Balance inquiry\n"
            << "Quit\n"
            << "\nPlease select now" << endl;
 
       cin >> choice;
       ans = choice[0];
       newBalance = balance;
 
       if ((ans == 'w') || (ans == 'W'))
       {
           cout << "\nWhat amount would you like to withdraw?" << endl;
           cin >> amount;
 
           while (amount > balance)
           {
               cout << "Sorry, you have insufficient funds.\n"
                   << "Please try again:  ";
               cin >> amount;
           }
           if (amount <= balance)
           {
               balance = balance - amount;
               newBalance = balance;
               cout << "Thank you, your new balance is: " << newBalance << endl;
               cout << "Would you like to make another transaction? (Y/N)" << endl;
               cin >> ans;
               if ((ans == 'y') || (ans == 'Y'))
                   continue;
               else
                   break;
           }
       }
       else if ((ans == 'd') || (ans == 'D'))
       {
           cout << "\nWhat amount would you like to deposit?" << endl;
           cin >> amount;
           balance = balance + amount;
           newBalance = balance;
           cout << "Thank you, your new balance is: " << newBalance <<endl;
           cout << "Would you like to make another transaction? (Y/N)" << endl;
           cin >> ans;
           if ((ans == 'y') || (ans == 'Y'))
               continue;
           else
               break;
       }
       else if ((ans == 'b') || (ans == 'B'))
       {
           cout << "Your balance is:  " << balance <<endl;
           cout << "Would you like to make another transaction? (Y/N)" << endl;
           cin >> ans;
           if ((ans == 'y') || (ans == 'Y'))
               continue;
           else
               break;
       }
       else if ((ans == 'q') || (ans =='q'))
           break;
       else
           continue;
       }
       while ((ans == 'w') || (ans == 'W') || (ans == 'd') || (ans == 'D')
           || (ans == 'b') || (ans == 'B') || (ans == 'q') || (ans == 'Q'));
 
   cout << "\nThank you for banking with Whatever ATM!" << endl;
 
}