fstream fail open file

[ar2007]

hi,
in this simple program to learn the i / o on files, the code works, but it always fails to open the file.
what determines the success of the call of the function member

test_file.open () ?

i use C :: B

thanks in advance.

#include <iostream>
#include <fstream>

using namespace std;

int main()
{
    string t_stream;
    fstream test_file;

    test_file.open( "testfile.txt", ios::in | ios::out );

    if ( test_file.is_open() )
    {
        while ( test_file.good() )
        {
            getline( test_file, t_stream );
            cout << t_stream << endl;
            test_file << " why dont open the file ? " << endl;
        }
        test_file.close();
    }
    else
        cout << " unable to open file " << endl;
    return 0;
}

[pnoid]

It worked for me. It opened the file and printed, "why dont open the file ?" and then closed file and exited program. Is that what it is supposed to do?

[willynilly]

Have you created a text file called "testfile" with the necessary information in it.

[ar2007]

@ pnoid:
yes, but on my computer the output is "unable for the open file"

[pnoid]

OK, I created the test file before I ran the program, sorry I assumed you did too. You have to create the file before you run it.

[LB]

ar2007, If you use VC++, you may need to place the file in the project directory instead of the executable directory. The issue is the change in working directory.

[ar2007]

@ L B:
i use code::blocks 12.11

can you explain better?

[ar2007]

other opinion ?

[IWishIKnew]

put the file in the folder that your executable is in.

[ar2007]

do you mean that I have to first create the file "testfile.txt"
and then use it in code?

[S G H]

I guess that's what they're saying.

[ar2007]

ok sorry.

thx at all

[willynilly]

See, the "testfile.txt" file should be in the same location as your code, if your code is under a folder called Texts then your" testfile.txt" file should also be in there......same location

hope this helps

[Nickel Dare]

Some explenation why it did not work.
Your say test_file.open and then ( "testfile.txt", ios::in | ios::out ); The "testfile.txt" basically says the Programm
"Look for a testfile.txt File in the folder of the .exe. Is it there?"