第2个回答 2013-01-14
#include<reg51.h>
#define uchar unsigned char
uchar led;
void delay()
{
uchar i,j;
for(i=0;i<100;i++)
for(j=0;j<125;j++);
}
main()
{
while(1)
{
P0=led|0x86; //LED0,LED3~LED6不变,LED1,LED2,LED7灭
delay();
P0=led&0x79; //LED0,LED3~LED6不变,LED1,LED2,LED7亮
delay();
}
}本回答被网友采纳