process_change() runs the user's input against the change-counting algorithm to see if the user has picked the correct amount. If the amount is right, it allows the player to proceed, otherwise it prompts the player that he has not succeeded and restarts the input. | process_change() runs the user's input against the change-counting algorithm to see if the user has picked the correct amount. If the amount is right, it allows the player to proceed, otherwise it prompts the player that he has not succeeded and restarts the input. |