#include<reg51.h>
int k=30;
unsigned char code f[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
void main()
{
EX0=1;
IT0=1;
EX1=1;
IT1=1;
EA=1;
while(1)
{
P1=f[k/10]; //P1显示十位
P2=f[k%10]; //P2显示个位
}
}
void jiashu() interrupt 0 //P3.2引脚加
{
if(k<99)k++;
else k=0;
}
void jianshu() interrupt 2 //P3.3引脚减
{
if(k>0)k--;
else k=99;
} |
