Passing variables to functions

Posted by Faken on Stack Overflow See other posts from Stack Overflow or by Faken
Published on 2010-06-03T20:40:18Z Indexed on 2010/06/03 20:44 UTC
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A quick question:

When i pass a variable to a function, dose the program make a copy of that variable to use in the function? If it dose and I knew that the function would only read the variable and never write to it, is it possible to pass a variable to the function without creating a copy of that variable or should I just leave that up to the compiler optimizations to do that automatically for me?

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