Thread: Newbie question: How to "save as" an existing text file

Can someone please help me on this?

I need to make a copy of an existing .txt file and save it under a different name. The original file needs to be preserved so a simple "rename" can't do the trick. I've been searching on the web and the only way I found was to read the existing file into some sort of a data structure, e.g. vector<string>, then dump the whole thing into a new .txt file.

I'm a bit concerned that the files are pretty big so is there a better way of doing this, please? Many thanks.

Hi siavoshkc,

Thanks very much for your reply. The code you suggested is indeed a dos command. So did you mean I put this line in a batch file the execute it in my C++ program?

p.s. sorry that I didn't say clearly in my original post that I was looking for solutions in C++

Thanks again

Sorry, me again. I think I found the solution:

system("copy c:\\org.txt c:\\dest.txt");

Thanks again for your help.

Originally Posted by siavoshkc

If its a programming practice. You create a memory buffer. Load data into it. Save it somewhere else or with a different name. If the file does not fit in memory, do the same thing in a loop to copy whole of it.

If it is not a programming practice tell me what it is.

Yup, it's a programming practice, in c++

and here's the original page where i found the solution
C++ copy / delete file

Right. Thank you both.