#include<reg51.h>
#define uchar unsigned char
#define uint unsigned int
uchar k,flag1,flag2,flag3;
sbit diocs=P2^5;
sbit key1=P3^4;
sbit key2=P3^5;
sbit key3=P3^6;
uchar code table1[]={
0xfe,0xfd,0xfb,0xf7,
0xef,0xdf,0xbf,0x7f};

uchar code table2[]={
0x7f,0xbf,0xdf,0xef,
0xf7,0xfd,0xfb,0xfe};