[求助]按矩阵键盘显示1-16的平方,无显示是哪里错了 -

以下为本人写的代码是矩阵键盘的
要求按下16个矩阵键盘依次在数码管上显示1-16的平方。如按下第一个显示1，第二个显示4...

请高手指教哪里错了为什么按下键盘后没有反应

#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();
}

}

程序太长看得眼花,虽然没能帮你找出错误，但是我在论坛找到一个和你实现一模一样功能的程序，我看了基本差不多，而且在我的板子上已经测试成功了你自己对比一下应该能找到错误所在希望能帮到你.