# include<reg52.h>
# include<stdio.h>

unsigned int n2;
unsigned int n4;
bit flag0;       //測頻完信號
bit flag1;

void timer1() interrupt 3
{if(flag0==1)
   {TR0=0;
    flag0=0;
    }

 else if(flag1==1)
  n4+=1;
                                 
 else
  n2+=1;
}