源程序：

#include <iostream>
#include <fstream>
using namespace std;
int main()
{
  char c;
  int num=0;
  freopen("d:\\test.txt","r",stdin);
  while(!cin.eof())0
  {
    cin>>c;
    num++;
  }

  cout<<"num的值是："<<num-1<<endl;

  return 0;
}