1、程序

#include "reg52.h"typedef unsigned int uint16;    //对系统默认数据类型进行重定义typedef unsigned char uint8;#define SMG_A_DP_PORT    P0    //应用宏定义数码管段码口//定义数码管位选信号管制脚sbit LSA=P2^2;sbit LSB=P2^3;sbit LSC=P2^4;//共阴极数码管显示0~F的段码数据uint8 gsmg_code[17]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,                          0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};void delay_10us(uint16 i){    while(i--);    }void smg_display(void){    uint8 i=0;    for(i=0;i<8;i++)    {           switch(i)//位选        {            case 0: LSC=1;LSB=1;LSA=1;break;            case 1: LSC=1;LSB=1;LSA=0;break;            case 2: LSC=1;LSB=0;LSA=1;break;            case 3: LSC=1;LSB=0;LSA=0;break;            case 4: LSC=0;LSB=1;LSA=1;break;            case 5: LSC=0;LSB=1;LSA=0;break;            case 6: LSC=0;LSB=0;LSA=1;break;            case 7: LSC=0;LSB=0;LSA=0;break;        }        SMG_A_DP_PORT=gsmg_code[i];//传送段选数据        delay_10us(100);//延时一段时间，期待显示稳固        SMG_A_DP_PORT=0x00;//消音    }}void main(){        while(1)    {           smg_display();    }        }

2、后果