#include
sbit?P2_0=P2^0;
sbit?P2_2=P2^2;
unsigned?char?GroupNo;
unsigned?char?code?Seg3code[5]={0x3f0x060x5b0x4f0x66};//0到4的代碼

void?delay（void）//延遲1毫秒
{
?unsigned?char?i;
?for（i=0;i<250;i++）;
}

void?ShowGroup（unsigned?char?n）//顯示出第幾組
{
?P1=Seg3code[n];
}

unsigned?char?KeySweep（void）//鍵盤掃描，獲取組數(shù)
{
?unsigned?char?tempn=0;
?if（P3!=0xff）???????????????//若有選手搶答
?{
??delay（）;??????????????????//延時消抖
??if（P3!=0xff）
??temp=~P3;
?}
?while（temp!=0）
?{
??temp=temp>>1;
??n++;
?}
?return?n;?????????????????//返回組數(shù)
}

void?timer0（void）?interrupt?1
{
?static?unsigned?j;
?TH0=（65536-50000）/256;//裝載計數(shù)初值
?TL0=（65536-50000）%256;
?j++;
?if（j%20==0）
?{
??EA=0;
?}
?P2_0=~P2^0;
}

void?Time0（void）//定時器0初始化
{
?TMOD=（TMOD&0xF0）|0x01;//定時器0方式1
?TH0=（65536-50000）/256;//裝載計數(shù)初值
?TL0=（65536-50000）%256;
?ET0=1;????????????????//CPU開中斷
?TR0=1;????????????????//啟動T/C0開始定時
}
?
void?main（）
{
?Time0（）;
?while（1）
?{
??P3=0xff;
??ShowGroup（0）;
??while（P3==0xff）;
??GroupNo=KeySweep（）;//調(diào)用鍵盤掃描函數(shù)
??ShowGroup（GroupNo）;//調(diào)用顯示函數(shù)
??EA=1;//CPU開中斷，進(jìn)入中斷程序
??while（P2_2==1）;//若主持人無按鍵按下
??delay（）;???????//延時消抖
??while（P2_2==1）;
??EA=0;//CPU關(guān)中斷
??}
}

????

?屬性????????????大小?????日期????時間???名稱
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?????文件?????114598??2007-05-30?09:37??四路搶答器\四路搶答器042?張晉\四路搶答器\Last?Loaded?四路搶答器.DBK

????..A.SH.??????7680??2007-05-30?09:41??四路搶答器\四路搶答器042?張晉\四路搶答器\Thumbs.db

?????文件???????3842??2007-05-29?20:06??四路搶答器\四路搶答器042?張晉\四路搶答器\四路搶答器\四路搶答器

?????文件???????1328??2007-05-30?09:45??四路搶答器\四路搶答器042?張晉\四路搶答器\四路搶答器\四路搶答器.c

?????文件?????196608??2007-05-26?19:48??四路搶答器\四路搶答器042?張晉\四路搶答器\四路搶答器\四路搶答器.DDB

?????文件????????947??2007-05-29?20:06??四路搶答器\四路搶答器042?張晉\四路搶答器\四路搶答器\四路搶答器.hex

?????文件?????????37??2007-05-29?20:06??四路搶答器\四路搶答器042?張晉\四路搶答器\四路搶答器\四路搶答器.lnp

?????文件???????3251??2007-05-29?20:06??四路搶答器\四路搶答器042?張晉\四路搶答器\四路搶答器\四路搶答器.LST

?????文件???????6664??2007-05-29?20:06??四路搶答器\四路搶答器042?張晉\四路搶答器\四路搶答器\四路搶答器.M51

?????文件???????4246??2007-05-29?20:06??四路搶答器\四路搶答器042?張晉\四路搶答器\四路搶答器\四路搶答器.OBJ

?????文件???????1009??2007-05-30?09:45??四路搶答器\四路搶答器042?張晉\四路搶答器\四路搶答器\四路搶答器.Opt

?????文件????????196??2007-05-30?09:45??四路搶答器\四路搶答器042?張晉\四路搶答器\四路搶答器\四路搶答器.plg

?????文件???????2008??2007-05-28?20:19??四路搶答器\四路搶答器042?張晉\四路搶答器\四路搶答器\四路搶答器.Uv2

????.......??????1007??2007-05-29?20:06??四路搶答器\四路搶答器042?張晉\四路搶答器\四路搶答器\四路搶答器_Opt.Bak

????.......??????2008??2007-05-28?19:22??四路搶答器\四路搶答器042?張晉\四路搶答器\四路搶答器\四路搶答器_Uv2.Bak

?????文件?????114598??2007-05-30?09:37??四路搶答器\四路搶答器042?張晉\四路搶答器\四路搶答器.DSN

?????文件?????224404??2007-05-30?09:44??四路搶答器\四路搶答器042?張晉\四路搶答器\四路搶答器.pdf

?????文件????????653??2007-05-30?09:38??四路搶答器\四路搶答器042?張晉\四路搶答器\四路搶答器.PWI

?????目錄??????????0??2007-05-30?09:45??四路搶答器\四路搶答器042?張晉\四路搶答器\四路搶答器

?????目錄??????????0??2008-05-06?13:58??四路搶答器\四路搶答器042?張晉\四路搶答器

?????目錄??????????0??2007-05-30?09:37??四路搶答器\四路搶答器042?張晉

?????目錄??????????0??2008-05-06?13:57??四路搶答器

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???????????????685302????????????????????23