/*
   PART - A: Please find the required solution:
   --------------------------------------------
*/

#include <iostream>
using namespace std;
int main()
{
   string input;
   do
   {
       cout   <<   "bank>";
       cin       >>   input;
       if(input.compare("deposit") == 0)
           cout   <<   "DEPOSIT SELECTED";
       else if(input.compare("withdraw") == 0)
           cout   <<   "WITHDRAW SELECTED";
       else if(input.compare("balance")   == 0)
           cout   <<   "BALANCE SELECTED";
       else if(input.compare("quit")!= 0 )
           cout   << "Please select correct operation";
       cout<<"\n";
   } while(input.compare("quit") != 0);
    return 0;
}

/*
Sample output:
--------------
bank>deposit
DEPOSIT SELECTED
bank>withdraw
WITHDRAW SELECTED
bank>balance
BALANCE SELECTED
bank>quit
*/

/*
   PART - B: Please find the required solution:
   --------------------------------------------
*/

#include <iostream>

using namespace std;

class Bank
{

   int account_balance[10] ;

public:
   void initialize() {
       for(int i=0 ; i<10;i++)
          account_balance[i] = 0;
   };
void deposit (int num,int value);
void withdraw (int num,int value);
int balance(int num);
void transfer(int from, int to, int value);
};

void Bank::deposit (int num, int value)
{
account_balance[num] = account_balance[num] + value;
}

void Bank::withdraw (int num, int value)
{
   if(account_balance[num] >= value)
        account_balance[num] = account_balance[num] - value;
    else
        cout   << "Insufficient Balance in account" << num << "\n";
}
int Bank::balance (int num)
{
   return account_balance[num];
}

void Bank::transfer(int from, int to, int value)
{
   if(account_balance[from] >= value)
   {
        account_balance[from] = account_balance[from] - value;
        account_balance[to] = account_balance[to] + value;
   }
   else
   {
        cout   << "Error! funds exceeded" << "\n";
   }
}

int main()
{
   Bank bank;
   string input;
   int num1,num2,value;

   bank.initialize();

   do
   {
       cout   <<   "bank>";
       cin       >>   input ;
       if(input.compare("balance")   == 0) {
           cin >> num1;
           cout   <<   bank.balance(num1);
       }
       else if(input.compare("deposit") == 0){
           cin >> num1 >> num2;
           bank.deposit(num1,num2);
       }
       else if(input.compare("withdraw") == 0){
           bank.withdraw(num1,num2);
       }
       else if(input.compare("transfer")   == 0){
           cin >> num1 >> num2 >> value;
           bank.transfer(num1,num2,value);
       }
       else if(input.compare("quit")!= 0 )
           cout   << "Please select correct operation";
       cout<<"\n";
   } while(input.compare("quit") != 0);
    return 0;
}

/*
Sample output:
bank>deposit 3 50

bank>balance 3
50
bank>balance 8
0
bank>transfer 3 8 20

bank>balance 3
30

bank>balance 8
20

bank>transfer 3 2 40
Error! funds exceeded

bank>quit
--------------*/