c语言51单片机编程。实现由一块单片机对模拟电压模数转换，显示电压值。按下shift键，将电压值传送给另一单片机，并打印出电压值。-51 microcontroller c language programming. By a single-chip analog-to-digital conversion of analog voltage, the voltage value is displayed. Press the shift key, the voltage value is transferred to another microcontroller, and print out the voltage value.