#include <reg51.h>	  // 包含头文件

// 定义单个 LED 的端口映射【sbit 变量名 = 端口^位号;】

sbit LED1 = P0^0;
sbit LED2 = P0^1;
sbit LED3 = P0^2;
sbit LED4 = P0^3;
sbit LED5 = P0^4;
sbit LED6 = P0^5;
sbit LED7 = P0^6;
sbit LED8 = P0^7;

void main() 
{
    
    LED1 = 0;	  // 让所有 LED 低电平（点亮）
    LED2 = 0;
    LED3 = 0;
    LED4 = 0;
    LED5 = 0;
    LED6 = 0;
    LED7 = 0;
    LED8 = 0;

    while (1);  // 让程序一直运行，保持 LED 亮起
}