How to execute a piece of code only once?

Question

I have an application which has several functions in it. Each function can be called many times based on user input. However I need to execute a small segment of the code wi

Answer 1

You can use local static variable:

void foo()
{
     static bool wasExecuted = false;
     if (wasExecuted)
         return;
     wasExecuted = true;

     ...
}