两数调换

#include<reg52.h>

#d
4000
efine uint unsigned int

#define uchar unsigned char

uchar code f[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};

sbit wela=P1^1;

sbit dula=P1^0;

sbit jian=P2^4;

void swap(uchar x,uchar y); 

uchar number1,number2;

void delay(uint z)

{

 uint x,y;

 for(x=z;x>0;x--)

  for(y=150;y>0;y--);

} 

void main()

{

 uchar a=3,b=8;

 while(1)

 {

    if(jian==0)

    {

        delay(10);

      if(jian==0)

       {

      swap(a,b);

      dula=1;

   P0=f[number1];

   dula=0;

   P0=0xff;

   wela=1;

   P0=0xfd;

   wela=0;

   delay(5);

   dula=1;

   P0=f[number2];

   dula=0;

   P0=0xff;

   wela=1;

   P0=0xfe;

   wela=0;

   delay(5);

            }

  }

  else

  {

   number1=a;

   number2=b;

      dula=1;

   P0=f[number1];

   dula=0;

   P0=0xff;

   wela=1;

   P0=0xfd;

   wela=0;

   delay(5);

   dula=1;

   P0=f[number2];

   dula=0;

   P0=0xff;

   wela=1;

   P0=0xfe;

   wela=0;

   delay(5);

   }

   }

}

void swap(uchar x,uchar y)

{

 number1=y;

 number2=x;

}