想寫一個從0以100MS加到999的程序總是出錯，求救。

#include<AT89X52.h>
#define uint unsigned int;
#define uchar unsigned char;
uint x,y,z;
uint num;
sbit duan=P2^7;
sbit wei=P2^6;
uchar code table[]={
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71};
void delay(uint z)
void display(uchar bai,uchar shi,uchar ge);
void main()
{
 while(1)
 { 
 
  for(num=0,num<999,num++)
  {
  
   bai=num/100;
   shi=num%100/10;
   ge=num%10;
   display(uchar bai,uchar shi,uchar ge) 
  
  }

 }

void display(uchar bai,uchar shi,uchar ge)
 {
         duan=1;
   P2=table[bai];
   duan=0;
   P2=0xff;
   wei=1;
   P2=0xfe;
   wei=0;
   delayms(100);
 
   duan=1;
   P2=table[shi];
   duan=0;
   P2=0xff;
   wei=1;
   P2=0xfd;
   wei=0;
   delay(100);
 
   duan=1;
   P2=table[ge];
   duan=0;
   P2=0xff;
   wei=1;
   P2=0xfb;
   wei=0;
   delay(100)
 }
void delay(uint z)
{
 uint x,y;
 for(x=z;x>0;x--)
  for(y=110;y>0;y--);
}