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you will need to pass in &heap which is of type heap **.
OK. This works. Instead of the

HeapCreate(heap, 1, (heapcomparefunc)rec_cmp);

The calling of the function of the HeapCreate(&heap, 1, (heapcomparefunc)rec_cmp);
is works.



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And you WILL need to initialise heap before you use it.
Will I need to malloc for this structure heap sepratately in the main function? How it will be ?