how to save to a text file

[mov]

I am a newbie, please someone tell me how to create a text file and save it
using c++.
thanks

 

[Victor Bazarov]

I am a newbie, please someone tell me how to create a text file and save it
using c++.

Create an std:fstream object. Write to it using <<.

#include <fstream>
int main()
{
std:fstream os("text_file.txt");
os << "Hello world!";
}

V

 

[Aggro]

#include <fstream>
int main()
{
std:fstream os("text_file.txt");

// Check could we open file for writing or not
if( os )
{
os << "Hello world!";
}
else
{
// This could happen for example if file already exists
// and it is read-only or user doesn't have permission to write
// into it.
std::cout << "Failed to open file";
}

 

[Victor Bazarov]

// Check could we open file for writing or not
if( os )
{
os << "Hello world!";
}
else
{
// This could happen for example if file already exists
// and it is read-only or user doesn't have permission to write
// into it.
std::cout << "Failed to open file";

I'd actually output that to std::cerr ...

}

V

 

[Karthik Kumar]

Create an std:fstream object. Write to it using <<.

#include <fstream>
int main()
{
std:fstream os("text_file.txt");
os << "Hello world!";
}

V

Isn't it important to close the file after writing it ?

os.close(); ?

 

[John Harrison]

Isn't it important to close the file after writing it ?

os.close(); ?

NO!!

This is C++, the ofstream destructor does that for you. This does seem to be
a very common misunderstanding however. I guess programmers get it drilled
into them from an early age that you must always close files that no-one
imagines that it could be any different in C++.

john