求大神帮忙看一下我的程序哪里错了

#include "reg52.h"
sbit key1=P2^0;
sbit key2=P2^1;
sbit key3=P2^2;
sbit key4=P2^3;
sbit key5=P2^4;
unsigned char code table[]={0x3f,0x0c,0x76,0x5e,0x4d,0x5b,0x7b,0x0e,0x7f,0x5f};
void delayms(unsigned int x);
void display(unsigned char x,unsigned char y,unsigned char a,unsigned char b);
void keyscan();
unsigned char keycts,num1,num11,num22,ge1,shi1,ge2,shi2;
char num60=60;
void main()
{
TMOD=0x01;
TH0=(65536-45872)/256;
TL0=(65536-45872)%256;
EA=1;
ET0=1;
TR0=1;
while(1)
{
if(TR0==0)
{
if(keycts==1)
P0=0xbe;
else if(keycts==2)
P0=0xee;
else if(keycts==3)
P0=0xbb;
else if(keycts==4)
P0=0x3e;
else
P0=0xb6;
}
else
{
if(num60-40>0)
{
num11=num60-30;
num22=num60-35;
P0=0xee;
}
else if(num60-35>0)
{
num11=num60-30;
num22=num60-35;
if(num1<=10)
P0=0xde;
else
P0=0xfe;
}
else if(num60-30>0)
{
num11=num60-30;
num22=num60-30;
P0=0x3e;
}
else if(num60-10>0)
}
{
num11=num60-5;
num22=num60;
P0=0xbb;
}
else if(num60-5>0)
{
num11=num60-5;
num22=num60;
if (num1<=10)
P0=0xbd;
else
P0=0xbf;
}
else
{
num11=num60;
num22=num60;
P0=0xb6;
}
shi1=num11/10;
ge1=num11%10;
shi2=num22/10;
ge2=num22%10;
dispaly(shi1,ge1,shi2,ge2);
keyscan();
}}
void display(unsigned char x,unsigned char y,unsigned char a,unsigned char b)
{
P1=table[x];P3=0xfe;delayms(1);
P1=table[y];P3=0xfd;delayms(1);
P1=table[a];P3=0xfb;delayms(1);
P1=table[b];P3=0xf7;delayms(1);
}
void delayms(unsigned int x)
{
unsigned int i,j;
for(i=x;i>0;i--)
for (j=110;j>0;j--);
}
void T0_time()interrupt 1
{
TH0=(65536-45872)/256;
TL0=(65536-45872)%256;
num1 ++;
if(num1==20)
{
num1=0;
num60--;
if(num60==0)
num60=60;
}
}
void keyscan()
{
if (key1==0)
{
delayms(10);
if(key1==0)
{
while(!key1);
TR0=~TR0;
keycts=1;
}
}
if (key2==0)
{
delayms(10);
if(key2==0)
{
while(!key2);
TR0=~TR0;
keycts=2;
}
}
if (key3==0)
{
delayms(10);
if(key3==0)
{
while(!key3);
TR0=~TR0;
keycts=3;
}
}
if (key4==0)
{
delayms(10);
if(key4==0)
{
while(!key4);
TR0=~TR0;
keycts=4;
}
}
if (key5==0)
{
delayms(10);
if(key5==0)
{
while(!key5);
TR0=~TR0;
keycts=5;
}
}
}