[求助]數(shù)碼管問題

#include<reg52.h>
#include<intrins.h>
#define uint unsigned int
#define uchar unsigned char
uchar table[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};
uint i,num,num_1,num_2,a,b,c;
uint qian,bai,shi,ge;
void display(uint qian,uint bai,uint shi,uint ge);
void delay(uint);
void main()
{
 TMOD=0x01;
 TH0=(65536-50000)/256;
 TL0=(65536-50000)%256;
 EA=1;
 ET0=1;
 TR0=1;
 num_2=4221;
 while(1)
 {
  display(qian,bai,shi,ge);
 }
}
void delay(uint i)
{
 int x,y;
 for(i=x;i>0;i--)
  for(y=110;y>0;y--);
}
void T0_timer() interrupt 1
{
 TH0=(65536-50000)/256;
 TL0=(65536-50000)%256;
 num++;
 if(num==2)
  {
   num=0;
   num_2--;
  }
}
void display(uint qian,uint bai,uint shi,uint ge)
{ 
 
 qian=num_2/1000;
 bai=num_2/100%10;
 shi=num_2/10%100;
 ge=num_2%10;
 P1=0XFE;
 P0=table[qian];
 delay(1);
 P1=0XFF;
 P0=0XFF;
 P1=0XFD;
 P0=table[bai];
 delay(1);
 P1=0XFF;
 P0=0XFF;
 P1=0XFB;
 P0=table[shi];
 delay(1);
 P1=0XFF;
 P0=0XFF;
 P1=0XF7;
 P0=table[ge];
 delay(1);
 P1=0XFF;
 P0=0XFF;
}怎么數(shù)碼管顯示出來小數(shù)啊