普中科技51纯代码（流水灯）

1.点亮一个灯

#include <reg51.h>

sbit led=P2^0;

void main()
{
   	
	while(1)
	{
   
		led=0;
	} 	
}

2.一个灯闪烁

#include <reg51.h>

typedef unsigned char u8;	//unsigned char在后边就被定义为u8
typedef unsigned int u16;

sbit led=P2^0
;

void delay(u16 xms)		//一种while循环
{
   
	while(xms--);	
}


void main()
{
   
	while(1)
	{
   
		led=0;
		delay(500000);
		led=1;
		delay(500000);
	}

}

3.流水灯

#include <REGX51.H>
#define uint unsigned int
void delayms(amx);
void main()
{
   
	while(1)
	{
   
		P2=0x7F;
		delayms(