You can make a single menu() function instead of repeating the same thing twice.
You defined the function dep() but never really used it ??
option 2 is for deposit and you are asking how much to withdraw!Code:case 2:printf("How much would you like to withdraw?"); scanf("%lf",&j); amount = with(j); j=0; printf("This is your balance amount: %f",amount);
and as others said--indent, use int main(), return 0, getchar() instead of getch() and get rid of <conio.h>