Do I need to free each individual element in a struct?

If I have a struct of ints, do I have to individually fr开发者_如何学Goee all of the ints (they are not pointers), or will they be freed when I call free() on the struct?

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No, they will be freed when the entire struct is freed.

(Note that you only need to free a struct that was allocated with malloc/calloc/realloc, not one that was allocated on a stack.)

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malloc and free go in pairs.
If you did not allocate memory dynamically for it, don't free it.