#include<reg51.h>
void delay(void)
{
unsigned char i = 100;
unsigned char j = 100;
while(i--)
{
while(j--);
}
} //延时函数
void main(void)
{
P0 = 0xff; //灯亮
delay(); //延时
P0 = 0x0; //灯灭
delay(); //延时
}
主要是要学会用for语句学会写延时函数
51例程---闪烁灯
void delay(void)
{
unsigned char i = 100;
unsigned char j = 100;
while(i--)
{
while(j--);
}
} //延时函数
void main(void)
{
P0 = 0xff; //灯亮
delay(); //延时
P0 = 0x0; //灯灭
delay(); //延时
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