How to open a file (for reading) in C++ Builder using codes?

# include the fstream header file,and create an instance of an fstream object i.e

#include <fstream>
using namespace std;

int main () {

  fstream filestr;

  filestr.open ("test.txt", fstream::in | fstream::out | fstream::app); // open a file with mode

  // >> i/o operations here <<

  filestr.close();

  return 0;
}

Thanks for the relpy.
will this work in c++ builder?

yeah it is part of the std c++ library...you can get much more in dept explanations on line i.e msdn.com

Hi thanks for the reply.
 i tried the above code, but it does not open the file!!!

Kind Regards,
Rowin

my bad had brain fart when writing the mode

this is the format for .open function call,
your_fstream_object.open( const char* szName, int nMode, int nProt = filebuf::openprot );

You can also open a file by calling the constructor, to check out all the specifics of fstream goto www.msdn.com ; type fstream::fstream in the search

#include <fstream> //dont forget to #include header file
using namespace std;

int main () {

  fstream filestr;

  // open somefile with append mode and default protection
  // Note if file does not reside in same file as sorce code you must specify the full path and name
 filestr.open("somefile.txt", ios::app);

  // >> i/o operations here <<

  filestr.close();

  return 0;
}

Hi,
the .open does not accept 3 parameters??

What i/o operations are you referring to?

What I need is that when I choose a file from an FileListBox and then click on a button, the file is opened and I can read what is written in it.

post some of your code

Hi,
I managed to do it.

I used:
HINSTANCE hInst = ShellExecute(0,"open",Filename, 0,0,SW_SHOW);

Kind Regards,