#include<reg51.h>void delay(unsigned int z) //声明延时函数sbit beep=P2^7 void main()数{　　while(1){　　　　beep=0 //蜂鸣器响　　　　delay(1) //调用1ms延时　　　　beep=1 //蜂鸣器不响　　　　delay(1) //调用1ms延时 　　}}void delay(unsigned int z)//1ms延时，通过z值改变延时{　　　　unsigned int x 　　　　for( z>0 z--)　　　　for(x=110 x>0 x--) }-# include <reg51.h> void delay (unsigned int z) // Delay function statement sbit beep = P2 ^ 7　void main () the number of (while (1) (beep = 0 // buzzer ring delay (1) // call 1ms delay beep = 1 // buzzer did not ring delay (1) // call the 1ms delay)) void delay (unsigned int z)// 1ms delay, change the delay through the z value (unsigned int x　 for (　z>　0　z-) for (x = 110　x>　0　x-) )