一个猜数程序。如果用户猜得太大，则背景变为红色，如果猜得太小，背景变为蓝色。界面上提供一个按钮，使用户可以重新开始这个游戏。在界面上还需显示用户猜测的次数。(A guessing program. If the user guesses too much, the background becomes red, if the guess is too small, the background becomes blue. A button is provided on the interface to enable the user to restart the game. The number of user guesses also needs to be displayed on the interface.)