这个单片机C程序错在哪里？为什么错误指在中断函数？

Question

#include "reg52.h"
#define unchar unsigned char
#define unit unsigned int
unit a,numbdu,numbwe;
sbit dula=P2^6;
sbit wela=P2^7;
unchar code tabledu[]=
{0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71};
unchar code tablewe[]=
{0xfe,0xfd,0xf7,0xef,0xdf};
void main()
{ a=0;
numbdu=0;
numbwe=0;
TMOD=0x01;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
EA=1;
ET0=1;
TR0=1;
while (1)
{
if(a==10)
{a=0;
numbdu++;
if(numbdu==7)
numbdu=0;
dula=1;
P0=tabledu[numbdu];
dula=0;

wela=1;
P0=tablewe[numbwe];
wela=0;
numbwe++;
if(numbwe==7)
numbwe=0;
}
}
void timer() interrupt 1
{
TH0=(65535-50000)/256;
TL0=(65535-50000)%256;
a++;
}

Answer 1

花括号不配对，你在 void timer() interrupt 1 前插入一空行，打上 }