Question

Suppose I declared a file ofstream myFile. Now I only want to create this file once, and when I execute this line a second time I don’t want to overwrite the file and create a new one?

Answer 1

If you have a one-file one-function setup (such as a log) you may consider using a static variable.

For example:

static ofstream* mylogger::outfile = new  ofstream ("log.log");

Just too be cool from main function you should push a clean up function

atexit (mylogger::closePointers);