8.sdi

数字钟

,,,#include <reg51.H>
,,,
,,,sbit P3_7=P3^7;
,,,unsigned char count;
,,,
,,,void delay10ms(void)
,,,{
,,,  unsigned char i,j;
000F,,,  for(i=20;i>0;i--)
000F,,,  for(j=248;j>0;j--);
,,,}
,,,
,,,void main(void)
,,,{
,,,  while(1)
,,,    {
,,,      if(P3_7==0)
,,,        {
00DE,,,          delay10ms();
,,,          if(P3_7==0)
,,,            {
000C,,,              count++;
,,,              if(count==16)
,,,                {
000C,,,                  count=0;
,,,                }
,,,              P1=~count;
,,,              while(P3_7==0);
,,,            }
,,,        }
,,,    }
,,,}