键盘调节数码管

 #include<reg52.h>
#define uchar unsigned char;
#define uint unsigned int;
sbit d1=P0^1;
sbit dula=P3^5;
sbit wela=P3^7;
sbit key1=P3^4;
uchar code table[]={
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71};
uchar num;

void delay(int z)
{
 int x,y;
  for(x=z;x>0;x--)
  for(y=110;y>0;y--);
}
void main()
{
 wela=1;
 P0=0xfe;
 wela=0;

 P3=0xff;
  while(1)
   {
   if(key1==0)
    {
     delay(5);
     if(key1==0)
     {
      d1=0;
      num++;
      if(num==10)
      num=0; 
     }
     while(!key1);
     delay(5);
     while(!key1);
    }
    else
     d1=1;
    dula=1;
    P0=table[num];
    dula=0;
   }
}