[求助]下面这个数码管同时亮并不停变换相同数字的程序对吗

#include<reg52.h>
#define uint unsigned int
#define uchar unsigned char
uchar num;
uchar code table[]={0xc0,0xf9,0xa4,0xb0,
0x99,0x92,0x82,0xf8,
0x80,0x90};
sbit d1=P2^0;
sbit d2=P2^1;
sbit d3=P2^2;
sbit d4=P2^3;
void delay(uint z);

void main()
{d1=0;
 d2=0;
 d3=0;
 d4=0;
 while(1)
 {      
 for(num=0;num++;num<16)
  {P0=table[num];
   delay(600);
  }
 }
}
void delay(uint z)
{uint x,y;
 for(x=100;x>0;x--)
   for(y=z;y>0;y--);
}