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以下為本人寫的代碼是矩陣鍵盤的
要求按下16個矩陣鍵盤依次在數碼管上顯示1-16的平方。如按下第一個顯示1，第二個顯示4...

請高手指教哪里錯了為什么按下鍵盤后沒有反應

#include<reg52.h>
#define uint unsigned int
#define uchar unsigned char
sbit dula=P2^6;
sbit wela=P2^7;
uchar code table[]={0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71};
char temp,bai,shi,ge,key;
void delay(uint z)
{
uint x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}

void display(uchar bai,uchar shi,uchar ge)
{
dula=1;
P0=table[bai];
dula=0;
P0=0xff;
wela=1;
P0=0xfe;
wela=0;
delay(5);

dula=1;
P0=table[shi];
dula=0;
P0=0xff;
wela=1;
P0=0xfd;
wela=0;
delay(5);

dula=1;
P0=table[ge];
dula=0;
P0=0xff;
wela=1;
P0=0xfb;
wela=0;
delay(5);
}
void keyscan()
{
P3=0xfe;
temp=P3;
temp=P3&0xf0;
if(temp!=0xf0)
{
delay(5);
temp=P3;
temp=P3&0xf0;
if(temp!=0xf0)
{
temp=P3;
switch(temp)
{
case 0xee: key=1;
break;
case 0xde: key=2;
break;
case 0xbe: key=3;
break;
case 0x7e: key=4;
break;
}
while(temp!=0xf0)
{
temp=P3;
temp=temp&0xf0;
}
temp=key*key;
bai=temp/100;
shi=temp%100/10;
ge=temp%10;
display(bai,shi,ge);
}
}

P3=0xfd;
temp=P3;
temp=P3&0xf0;
if(temp!=0xf0)
{
delay(5);
temp=P3;
temp=P3&0xf0;
if(temp!=0xf0)
{
temp=P3;
switch(temp)
{
case 0xed: key=5;
break;
case 0xdd: key=6;
break;
case 0xbd: key=7;
break;
case 0x7d: key=8;
break;
}
while(temp!=0xf0)
{
temp=P3;
temp=temp&0xf0;
}
temp=key*key;
bai=temp/100;
shi=temp%100/10;
ge=temp%10;
display(bai,shi,ge);
}
}

P3=0xfb;
temp=P3;
temp=P3&0xf0;
if(temp!=0xf0)
{
delay(5);
temp=P3;
temp=P3&0xf0;
if(temp!=0xf0)
{
temp=P3;
switch(temp)
{
case 0xeb: key=9;
break;
case 0xdb: key=10;
break;
case 0xbb: key=11;
break;
case 0x7b: key=12;
break;
}
while(temp!=0xf0)
{
temp=P3;
temp=temp&0xf0;
}
temp=key*key;
bai=temp/100;
shi=temp%100/10;
ge=temp%10;
display(bai,shi,ge);
}
}

P3=0xf7;
temp=P3;
temp=P3&0xf0;
if(temp!=0xf0)
{
delay(5);
temp=P3;
temp=P3&0xf0;
if(temp!=0xf0)
{
temp=P3;
switch(temp)
{
case 0xe7: key=13;
break;
case 0xd7: key=14;
break;
case 0xb7: key=15;
break;
case 0x77: key=16;
break;
}
while(temp!=0xf0)
{
temp=P3;
temp=temp&0xf0;
}
temp=key*key;
bai=temp/100;
shi=temp%100/10;
ge=temp%10;
display(bai,shi,ge);
}
}
}

void main()
{

while(1)
{
keyscan();
}

}

程序太長看得眼花,雖然沒能幫你找出錯誤，但是我在論壇找到一個和你實現一模一樣功能的程序，我看了基本差不多，而且在我的板子上已經測試成功了你自己對比一下應該能找到錯誤所在希望能幫到你.

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