#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit key1=P3^4;
sbit key2=P3^5;
sbit key3=P3^6;
sbit key4=P3^7;
sbit dula=P1^0;
sbit wela=P1^1;
sbit led1=P0^0;
uchar code table[]={0x3f,0x06,0x5b,0x4f,
     0x66,0x6d,0x7d,0x07,
     0x7f,0x6f,0x77,0x7c,
     0x39,0x5e,0x79,0x71};
void delayms(uint);
void display(uchar  numdis);
uchar num,num1,num2,shi,ge;

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