这是一个关于简单使用51单片机独立按键的示范代码，里面有详细的注释，功能是使用独立按键亮起一个灯，适用于初学者。-This is a simple code about using a button of 51MCU, there are detailed notes in the .c file, its function is using a button to turn on lights ,is very usefull for a new hand.