实验四：蜂鸣器实验四：蜂鸣器
#include “reg52.h”typedef unsigned char u8;typedef unsigned int u16;sbit beep=P1^5;//u8 code tabe[]={};//共阴极数码管、P22,P23,P24三八译码器void delay(u16 i){while(i–);}void main(){while(1){beep=~beep;delay(10);}}
