fstream

[holtaf]

I have some newbie question.When I trying to read data from file the last block is reading two times .The condition in loop is (!eof) What am I doing wrong???
This is my code :

#include <fstream>
#include <iostream>
using namespace std;
int main( int argc, char* argv[] ) {
   ifstream in( "some_file" );
   
   int count = 0, num;


   while( !in.eof() ) {
    in >> num;
    count ++ ;


   }
   
    cout << count ;



}

The content of "some_file" is

1
2
3
4

And the output is

5

-holtaf

[hamsterman]

Don't check eof to see if there is anything else to read. At times input functions will not find it. For example, if there is a space after the last digit. You should instead check the fail flag after the input. That is,

while( in >> num )
   count++;

You could also use the .fail() method.

[holtaf]

Thanks!