#include<reg51.h>
sbit add=P3^2;
sbit sub=P3^3;
bit add_bak;
bit sub_bak;
void delay(int num){
int k,l;
for(k=0;k<num;k++)
for(l=0;l<10;l++)
;
}
unsigned char table[10]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};
unsigned char WeiMa[8]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};
int i,j,n,t;
void main()
{
P2=WeiMa[7];
P0=table[0];
n=0;
while(1){
if(add==0&&add_bak==1){
n++;
if(n>99){
n=0;
}
i=n/10%10;
if(i>0){
P2=WeiMa[6];
P0=table;
delay(10);
P0=0xff;
}
else{
P2=WeiMa[6];
P0=table[0];
delay(10);
P0=0xff;
}
P2=0x00;
j=n%10;
P2=WeiMa[7];
P0=table[j];
delay(10);
P0=0xff;
P2=0x00;
add_bak=0;
}
if(add==1){
add_bak=1;
}
if(sub==0&&sub_bak==1){
n--;
if(n<0){
n=99;
}
i=n/10%10;
if(i>0){
P2=WeiMa[6];
P0=table;
delay(10);
P0=0xff;
}
else{
P2=WeiMa[6];
P0=table[0];
delay(10);
P0=0xff;
}
P2=0x00;
j=n%10;
P2=WeiMa[7];
P0=table[j];
delay(10);
P0=0xff;
P2=0x00;
sub_bak=0;
}
if(sub==1){
sub_bak=1;
}
}
}
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