#include <stdio.h>
    
main() 
{
  int x, a;
  x = 15000;
  printf("Choose [1: deposit] or [2: withdrawal] or [3: balance]");
  scanf("%d", &a);
  while (a != 0) {	
    if (a == 1) {
      printf("Deposit: how much? \n");
    } else if (a == 2) {
      printf("Withdrawal: how much? \n");
    } else if (a == 3) {
      printf("balance --- %d yen \n", x);
    } else {
      printf("error! \n");
    } 
    printf("Choose [1: deposit] or [2: withdrawal] or [3: balance]");
    scanf("%d", &a);
  }
  printf("Good Bye!\n");
}