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36 lines
716 B
36 lines
716 B
Binary heaps
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============
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* <<intro,Introduction>>
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* <<macros,Macros>>
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* <<example,Example>>
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!!ucw/heap.h
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[[example]]
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Example
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-------
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static uint n;
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static int heap[4];
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// Create an empty heap
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n = 0;
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#define MY_CMP(x, y) ((x) < (y))
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// Insert 20, 10, 30
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HEAP_INSERT(int, heap, n, MY_CMP, HEAP_SWAP, 20);
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HEAP_INSERT(int, heap, n, MY_CMP, HEAP_SWAP, 10);
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HEAP_INSERT(int, heap, n, MY_CMP, HEAP_SWAP, 30);
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// Remove the minimum (10)
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HEAP_DELETE_MIN(int, heap, n, MY_CMP, HEAP_SWAP);
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// Print the new minimum (20)
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printf("%d", heap[1]);
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// Increase the minimum to 40
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HEAP_INCREASE(int, heap, n, MY_CMP, HEAP_SWAP, 1, 40);
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// Print the new minimum (30)
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printf("%d", heap[1]);
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