ifstream object.eof() not working

Question

I think i might need to use a boolean bValue = false for my while condition:

char cArray[ 100 ] = \"\";
ifstream object;
cout << \"Enter full path name         


        

Answer 1

The ifstream::open function takes a filename and an optional mode. Since you want to read the whole file, why not just start at the begining:

ifstream obj(cArray);
if (obj) { // file successfully opened for reading
    while (obj.good()) {
        // read in a line at a time
        string line;
        getline(line, obj);
        if (!line.empty()) { // we have something to work with
           // parse
        }
    }
}

Of course, a sleeker version is to test for getline in the while loop as Neil Butterworth.

Answer 2

Please will you and everyone else note that the correct way to read a text file does NOT require the use of the eof(), good(), bad() or indifferent() functions (OK, I made the last one up). The same is true in C (with fgets(), feof() et al). Basically, these flags will only be set AFTER you have attempted to read something, with a function like getline(). It is much simpler and more likely to be correct to test that read functions, like getline() have actually read something directly.

Not tested - I'm upgrading my compiler:

#include <iostream>
#include <fstream>
#include <string>
using namespacr std;

imt main() {

   string filename;
   getline( cin, filename );

   ifstream ifs( filename.c_str() );
   if ( ! ifs.is_open() ) {
       // error
   }

   string line;
   while( getline( ifs, line ) ) {
       // do something with line
   }
}