静态点亮数码管的某几段（STC89C52单片机）

#include <reg52.h>

sbit ADDR0 = P1^0;
sbit ADDR1 = P1^1;
sbit ADDR2 = P1^2;
sbit ADDR3 = P1^3;
sbit ENLED = P1^4;

void main()
{
    ENLED = 0;    //使能U3，选择数码管DS1
    ADDR3 = 1;
    ADDR2 = 0;
    ADDR1 = 0;
    ADDR0 = 0;
    P0 = 0xF9;    //点亮数码管段b和c
    while (1);
}