新手做的单片机仿真时钟通过编译，但跑不起来，求各位大佬指教

ID:600695 · 发表于 2020-4-14 05:26

#include<reg52.h>
#define uchar unsigned char;
#define uint unsigend int;
uchar position;
uchar tt;
uchar second;
uchar minute;
uchar hour;
uchar code table[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};//?????????0-9????
sbit smg_q=P1^0; //?????????????
sbit smg_b=P1^1;
sbit smg_s=P1^2;
sbit smg_g=P1^3;

sbit key1=P3^7; //????4??????
sbit key2=P3^6;
sbit key3=P3^5;
sbit key4=P3^4;
void keyscan ();//????????
void display(unsigned char hour,unsigned char minute);
void delay(unsigned int timer);
void init();
void main()
{
init();
while(1)
{
  if(tt==20)
{
  tt=0;
  second++;
  if(second==60)
  {
  second=0;
  minute++;
  if(minute==60)
  {
minute=0;
hour++;
if(hour==24)
hour=0;
  }
  }
}
keyscan();
display(hour,minute);
delay(1);
}
}
  void keyscan()
  {
if(key1==0)
{
TR0=0;
hour++;
if(hour==24)
hour=0;
delay(200);
TR0=1;
  }
if(key2==0)
{
  TR0=0;
hour--;
if(hour<0)
hour=23;
delay(200);
TR0=1;
}
  if(key3==0)
{
  TR0=0;
minute--;
if(minute==60)
minute=0;
delay(200);
TR0=1;
}
if(key4==0)
{
  TR0=0;
minute--;
if(minute<60)
minute=59;
delay(200);
TR0=1;
}
}
  void init()
  {
tt=0;
  position=0;
  second=0;
  minute=0;
  hour=0;
  smg_q=1;
  smg_b=1;
  smg_s=1;
  smg_g=1;
  key1=1;
  key2=1;
  TMOD=0x01;
  TH0=(65536-50000)/256;
  TL0=(65536-50000)%256;
  EA=1;
  ET0=1;
  TR0=1;
  }
  void t0() interrupt 1
  {
TH0=(65536-50000)/256;
  TL0=(65536-50000)%256;
  tt++;
  }
  void display(unsigned char hour,unsigned char minute)
  {
  P0=0xff;
  switch(position)
  {
case 0:
smg_g=1;
smg_q=0;
P0=table[hour/10];
break;
  case 1:
smg_q=1;
smg_b=0;
P0=table[hour%10];

if(tt>=10);
P0&=0x7f; //С???????????????
break;
case 2:
smg_b=1;
smg_s=0;
P0=table[minute/10];
break;
   case 3:
smg_s=1;
smg_g=0;
P0=table[minute%10];
break;
  }
  position++;
  if(position>3)
  position=0;

  }
  void delay(unsigned int time)
  {
unsigned int x,y;
for(x=time;x>0;x--)
  for(y=110;y>0;y--);
  }

程序通过编译，但在仿真上跑不起来，找了几个小时不知道错在哪，百度找的例子，求解啊大神