[求助]求指導(dǎo)

#include<reg52.h>
#define uint unsigned int
#define uchar unsigned char
sbit dula=P2^6;
sbit wela=P2^7;
sbit D1=P1^0;
uchar code table[]={
0xc0,0xf9,0xa4,0xb0,
0x99,0x92,0x82,0xf8,
0x80,0x90,0x88,0x83,
0xc6,0xA1,0x86,0x8E};
uchar num;
void delay(uint z);
void main()
{
 EA=1;
 EX0=1;
 wela=1;
 P0=0x55;
 wela=0;
 while(1)
 {
  for(num=0;num<16;num++)
   {
    dula=1;
    P0=table[num];
    dula=0;
    delay(1000); 
   }
 }
}

void delay(uint z)
{
 uint x,y;
 for(x=100;x>0;x--)
  for(y=z;y>0;y--); 
}

void exter0 interrupt 0
{
 D1=0;
}