求大神来帮忙解决一下问题

#include<reg51.h>
unsigned char weima[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};
unsigned char duanma[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
sbit KEY1=P2^0;
sbit KEY2=P2^1;
#define duanxuan P0
#define weixuan P1
void delay(unsigned int i);
void dingshiqi();
unsigned int i,j;
static unsigned char k;
unsigned int time=0;
unsigned int m;
void main()
{
dingshiqi();
while(1)
{
if(KEY1==0)
{
for(j=0;j<10000;j++);
if(KEY1==0)
{
if(k<99)
{
k++ ;
}
while((KEY1==0)&&(i<50))
{
delay(500);
i++;
}
i=0;
}
}
if(KEY2==0)
{
for(j=0;j<10000;j++);
if(KEY2==0)
{
if(k>0)
{
k-- ;
}
while((KEY1==0)&&(i<50))
{
delay(500);
i++;
}
i=0;
}
}
duanxuan=duanma[k/10];
weixuan=weima[0] ;
weixuan=0xff;
duanxuan=duanma[k%10];
weixuan=weima[1];
weixuan=0xff;
}
}
void delay(unsigned int i)
{
while(i--);
}
void dingshiqi()
{
TMOD |=0x01;
TH0=0x3c;
TL0=0xb0;
EA=1;
ET0=1;
TR0=1;
}
void zhongduan() interrupt 1
{
TH0=0x3c;
TL0=0xb0;
}