大神帮看下程序哪出错了

有人在么？

100/10等于多少？

程序已经修改好了，谢谢各位的意见。
#include <reg52.h>
#define uchar unsigned char
#define ulong unsigned long //之前用int数值不够大
sbit k1=P1^0; // +1
sbit k2=P1^1; // -1
sbit k3=P1^2; // 999999
sbit k4=P1^3; // 000000
sbit k5=P1^4; // +50
ulong count=0;
uchar a,b,c,d,e,f;
uchar code table[]={~0x3f,~0x06,~0x5b,~0x4f,
~0x66,~0x6d,~0x7d,~0x07,
~0x7f,~0x6f};
void delay(uchar i)
{
uchar j;
while(i--)
for(j=110;j>0;j--);
}
void main()
{
while(1)
{
if(!k1)
{
delay(10);
if(!k1)
count++;
if(count==1000000)
count=0;
while(!k1);
}
if(!k2)
{
delay(10);
if(!k2)
count--;
if(count==-1)
count=999999;
while(!k2);
}
if(!k5)
{
delay(10);
if(!k5)
count=count+50;
while(!k5);
}
if(!k3)
{
delay(10);
if(!k3)
count=999999;
while(!k3);
}
if(!k4)
{
delay(10);
if(!k4)
count=0;
while(!k4);
}
a=count%10;
b=count%100%100/10; //因为数值六位数要求余两次才行
c=count%1000/100;
d=count%10000/1000;
e=count%100000/10000;
f=count%1000000/100000;
P3=0x01;
P2=table[f];
delay(10);
P3=0x02;
P2=table[e];
delay(10);
P3=0x04;
P2=table[d];
delay(10);
P3=0x08;
P2=table[c];
delay(10);
P3=0x10;
P2=table[b];
delay(10);
P3=0x20;
P2=table[a];
delay(10);
}
}