4.c

C51 程序练习

//用8个发光管演示出8位二进制数累加过程
#include<reg52.h> 
#define uint unsigned int   
#define uchar unsigned char 
void delay(uint z)  
{    
 uint x,y;
 for(x=z;x>0;x--)
  for(y=110;y>0;y--); 
}
void main()   
{
 uchar a;
 while(1)       
 {
  a++;
  P2=~a;
  delay(200); 
 }
}