Free memory allocated in a different function?

Question

I\'m trying to learn C and I\'m currently trying to write a basic stack data structure, but I can\'t seem to get basic malloc/free right.

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Answer 1

Whenever you pass a parameter to a function, a copy is made, and the function works on that copy. So in your case, you are trying to free a copy of the original object, which doesn't make any sense.

You should modify your function to take a pointer, and then you can have it call free directly on that pointer.