为什么我写的89C52 中断程序下载到实验板上不响应中断呢？软件仿

#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
uchar num;
uint t,e;
uchar code table[]={
0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,
0xF8,0x80,0x90,0x88,0x83,0xC6,0xA1,
0x86,0x8E}; //0-F对应的段码；
void main()
{
EA=1;
EX0=1;
P1=0xff;//开位码

while(1)
{

for(num=0;num<16;num++)
{
P0=table[num];
t=50000;
while(t--);
};

}
}
void inter0() interrupt 0
{
P0=0x0;
e=50000;
while(e--);

}