频率计程序

#include 
unsigned char code dispbit[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f}; 
unsigned char code dispcode[]={0x3f,0x06,0x5b,0x4f,0x66, 
                               0x6d,0x7d,0x07,0x7f,0x6f,0x00,0x40}; 
unsigned char dispbuf[8]={0,0,0,0,0,0,10,10}; 
unsigned char temp[8]; 
unsigned char dispcount; 
unsigned char T0count; 
unsigned char timecount; 
bit flag; 
unsigned long x; 
void main(void) 
{ 
  unsigned char i; 
  TMOD=0x15; 
  TH0=0; 
  TL0=0; 
  TH1=(65536-4000)/256; 
  TL1=(65536-4000)%6; 
  TR1=1; 
  TR0=1; 
  ET0=1; 
  ET1=1; 
  EA=1; 
  while(1) 
   { 
     if(flag==1) 
       { 
         flag=0; 
         x=T0count*65536+TH0*256+TL0;