今天做了一個數碼管顯示，算是入門了

#include<reg52.h>
#define uint unsigned int
#define uchar unsigned char
uchar code tablewe[]={
0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f
};
uchar code tabledu[]={
0xc0,0xf9,0xa4,0xb0,
0x99,0x92,0x82,0xf8,
0x80,0x90,0x88,0x83,
0xc6,0xa1,0x86,0x8e};
uchar aa,numwe,numdu;
void delay(uint z);
void main()
{   
 aa=0;
 numwe=0;
 numdu=0;
 P3=0XFF;
 P0=0XFF;
 
 TMOD=0x01;
 TH0=(65536-50000)/256;
 TL0=(65536-50000)%256;
 
 EA=1;//開總中斷
 ET0=1;//開定時器0中斷
 TR0=1;//啟動定時器0


 while(1)
 {  
  
  if(aa==10)
  {
   aa=0;
   P3=tablewe[numwe];
   if(numwe!=7)
   numwe++;
    else numwe=0;
   delay(100);
   P0=tabledu[numdu];
   if(numdu!=15)
   numdu++;
    else numdu=0;
   
   }  
 }
 
  
}


void timer0() interrupt 1 
{
 TH0=(65536-50000)/256;
 TL0=(65536-50000)%256;
 aa++;
}
void delay(uint z)
{
 uint x,y;
 for(x=z;x>0;x--)
  for(y=98;y>0;y--);
}