c51八路抢答器代码

以下是c51八路抢答器的代码：

#include <reg52.h>

sbit KEY1 = P3^2;
sbit KEY2 = P3^3;
sbit KEY3 = P3^4;
sbit KEY4 = P3^5;
sbit KEY5 = P3^6;
sbit KEY6 = P3^7;
sbit KEY7 = P2^0;
sbit KEY8 = P2^1;

unsigned char code table[] = {0xfe, 0xfd, 0xfb, 0xf7, 0xef, 0xdf, 0xbf, 0x7f};

void delay(unsigned int i)
{
    while(i--);
}

void main()
{
    unsigned char i = 0;
    while(1)
    {
        if(KEY1 == 0)
        {
            delay(1000);
            if(KEY1 == 0)
            {
                P1 = table[i];
                i++;
                if(i == 8)
                {
                    i = 0;
                }
            }
            while(!KEY1);
        }
        if(KEY2 == 0)
        {
            delay(1000);
            if(KEY2 == 0)
            {
                P1 = table[i];
                i++;
                if(i == 8)
                {
                    i = 0;
                }
            }
            while(!KEY2);
        }
        if(KEY3 == 0)
        {
            delay(1000);
            if(KEY3 == 0)
            {
                P1 = table[i];
                i++;
                if(i == 8)
                {
                    i = 0;
                }
            }
            while(!KEY3);
        }
        if(KEY4 == 0)
        {
            delay(1000);
            if(KEY4 == 0)
            {
                P1 = table[i];
                i++;
                if(i == 8)
                {
                    i = 0;
                }
            }
            while(!KEY4);
        }
        if(KEY5 == 0)
        {
            delay(1000);
            if(KEY5 == 0)
            {
                P1 = table[i];
                i++;
                if(i == 8)
                {
                    i = 0;
                }
            }
            while(!KEY5);
        }
        if(KEY6 == 0)
        {
            delay(1000);
            if(KEY6 == 0)
            {
                P1 = table[i];
                i++;
                if(i == 8)
                {
                    i = 0;
                }
            }
            while(!KEY6);
        }
        if(KEY7 == 0)
        {
            delay(1000);
            if(KEY7 == 0)
            {
                P1 = table[i];
                i++;
                if(i == 8)
                {
                    i = 0;
                }
            }
            while(!KEY7);
        }
        if(KEY8 == 0)
        {
            delay(1000);
            if(KEY8 == 0)
            {
                P1 = table[i];
                i++;
                if(i == 8)
                {
                    i = 0;
                }
            }
            while(!KEY8);
        }
    }
}