C51单片机编程 求按下1次按键 8盏LED灯全亮源程序

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#include "reg51.h"

sbit key=P1^1;//按键IO，按下举升低电型答凳平
void main()
{
while(key);//等待卜旅按键按下

P2=0;//8个LED接在P2口的8个IO上，低电平点亮

}

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#include <码含STC89C5xRC.H>改模哗核行
#define uchar unsigned char
#define uint unsigned int
sbit k1=P3^5;
void delay_ms(uint xms)
{
int i, j;
for(i=0;i<xms;i++)
{for(j=0;j<7;j++);}
}
void main()
{
P0=0xFF;
k1=1;
while(1)
{
if(k1==0)
{
P0=~P0;
}
}

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