这是一个单片机数码管显示000.0到999.9，并且在到自己学号时可以控制蜂鸣器鸣叫，百位数上的数字是表示显示自己学号的次数。-This is a single-chip digital display from 000.0 to 999.9, the buzzer can be controlled and to their own student number, the number on the hundreds digit is said to show the number of st