利用51单片机仿真实现检测按键按下的次数

#include<reg51.h> unsigned int licheng=0; unsigned char a[]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0x77,0x7C,0x39,0x5E,0x79,0x71}; //共阴极数码管编码 unsigned char SM_table[5] = {0};//数码管输出数据缓存 void delayms(unsigned char k); void SM_Cache(); void main() { EA=1; EX0=1; IT0=1; P2=0x00; P3&=0xbf; /*这个关系到74HC02芯片的逻辑关系（启动芯片）*/ while(1) { // P1=0x00; // P0=a[(licheng/100000)%10]; // delayms(10); /*unsigned int类型变量最大取值为65535（100000超出范围定义变量范围）*/ SM_Cache(); P1=0x01; P0=a[SM_table[4]]; delayms(3); P1=0x02; P0=a[SM_table[3]]; delayms(3); P1=0x03; P0=a[SM_table[2]]; delayms(3); P1=0x04; P0=a[SM_table[1]]; delayms(3); P1=0x05; P0=a[SM_table[0]]; delayms(3); } } void SM_Cache() { SM_table[4] = (licheng/10000)%10; SM_table[3] = (licheng/1000)%10; SM_table[2] = (licheng/100)%10; SM_table[1] = (licheng/10)%10; SM_table[0] = licheng%10; } void delayms(unsigned char k) { unsigned char i,j; for(i=0;i<k;i++) for(j=0;j<255;j++); } void int0() interrupt 0 { licheng++; }