Creating files in C++

Question

I want to create a file using C++, but I have no idea how to do it. For example I want to create a text file named Hello.txt.

Can anyone help me?

Answer 1

One way to do this is to create an instance of the ofstream class, and use it to write to your file. Here's a link to a website that has some example code, and some more information about the standard tools available with most implementations of C++:

ofstream reference

For completeness, here's some example code:

// using ofstream constructors. #include <iostream> #include <fstream>    std::ofstream outfile ("test.txt");  outfile << "my text here!" << std::endl;  outfile.close(); 

You want to use std::endl to end your lines. An alternative is using '\n' character. These two things are different, std::endl flushes the buffer and writes your output immediately while '\n' allows the outfile to put all of your output into a buffer and maybe write it later.

Answer 2

Do this with a file stream. When a std::ofstream is closed, the file is created. I prefer the following code, because the OP only asks to create a file, not to write in it:

#include <fstream>  int main() {     std::ofstream { "Hello.txt" };     // Hello.txt has been created here } 

The stream is destroyed right after its creation, so the stream is closed inside the destructor and thus the file is created.