Files, reading, writing, and naming?

[NobleKnight]

Using C++ I know how to write a file and read from it, this site does a good job of explaining how tod do that, however, I was wondering if there was a way in which, I could have my program save the file as a new name each time. In other words, I want to automatically create a new file and not have my previous file overwritten. Ideally it would be named after the current system time. I've tried setting a string variable to the system time and then using that variable as the file name... but I'm not sure if that's even possible.

[Lynx876]

It should be very possible. Do as you said above and use the string in an ofstrem object;

std::ofstream oFile( std::string, std::ios::out );

oFile << stuff;

oFile.close();

I've never used it to create files with names I want, but some people in this forum have used c_str();

std::string name;

std::getline( std::cin, name, '\n' );

std::ofstream oFile( name.c_str(), std::ios::out );

oFile << stuff;

oFile.close();

Also, if you want to write to a file and just write to the end of it, i.e. not overwrite, you need to appened to it;
std::ofstream oFile( name, std::ios::out | std::ios::app );

[dolphin spa]

Adding on to the above point (which essentially talks about how you can take in a file name from the user and create a file using the user's input) -

Note that: ofstream oFile( xyz) automatically opens the file. xyz needs to be a CString. That is why we use name.c_str() to convert it to Cstring.

If you are still looking for creating new files each time and naming them after the current system time, I suggest you to go through the below articles. They helped me accomplish the exact same task you are talking about.

http://www.cplusplus.com/reference/clibrary/ctime/
http://www.cplusplus.com/reference/clibrary/ctime/strftime/