【0】README

本文idea 均為原創(chuàng)，?for source code, please visit?https://github.com/pacosonTang/dataStructure-algorithmAnalysis/tree/master/chapter6/p140_binaryheap_conclusion?

【1】insert操作

// Attention, the index of the heap starts from 1 void insert(ElementType value, BinaryHeap bh) {int i;if(isFull(bh)){Error("failed insertion , for the BinaryHeap is full, from func insert!");return ; }for(i = ++bh->size; bh->elements[i/2] > value; i /= 2)bh->elements[i] = bh->elements[i / 2];bh->elements[i] = value; }

【2】deleteMin操作

ElementType deleteMin(BinaryHeap bh) { ElementType minimum;ElementType *data; if(isEmpty(bh)){Error("failed deleting minimum , for the BinaryHeap is empty, from func deleteMin !");return -1; }data = bh->elements; minimum = data[1];swap(&data[1], &data[bh->size]); // &variable means nickname of the variablebh->size-- ; // size-- occurs prior to percolateDownFromOne percolateDown(1, bh) ; return minimum; } // percolating down the element when its value is greater than children (minimal heap)//Attention: all of bh->elements starts from index 1void percolateDown(int index, BinaryHeap bh){ ElementType *data;int size;ElementType temp;int child;data = bh->elements;size = bh->size;for(temp = data[index]; leftChild(index) <= size; index = child){child = leftChild(index);if(child < size && data[child] > data[child+1]){child++;}if(temp > data[child]){data[index] = data[child];}else{break;}}data[index] = temp;}

【3】increaseKey操作，用到了下濾操作（干貨——下濾操作）
// increase element's value void increaseKey(int index, ElementType increment, BinaryHeap bh) { if(index > bh->size || index < 1){Error(" failed increaseKey, since overstep the boundary! ");return ;}bh->elements[index] += increment; // update the element under given indexpercolateDown(index, bh); } // percolating down the element when its value is greater than children (minimal heap)//Attention: all of bh->elements starts from index 1void percolateDown(int index, BinaryHeap bh){ ElementType *data;int size;ElementType temp;int child;data = bh->elements;size = bh->size;for(temp = data[index]; leftChild(index) <= size; index = child){child = leftChild(index);if(child < size && data[child] > data[child+1]){child++;}if(temp > data[child]){data[index] = data[child];}else{break;}}data[index] = temp;}

【4】decreaseKey操作，用到了上濾操作（干貨——上濾操作）
//decreasing value of the element under index by increment void decreaseKey(int index, ElementType decrement, BinaryHeap bh) { if(index > bh->size || index < 1){Error(" failed decreaseKey, since overstep the boundary! ");return ;}bh->elements[index] -= decrement; // update the element under given indexpercolateUp(index, bh); }int parentIndex(int index) {return index / 2; }// percolating up the element when its value is greater than children (minimal heap)//Attention: all of bh->elements starts from index 1void percolateUp(int index, BinaryHeap bh){ ElementType *data;ElementType temp;int size; int parent;data = bh->elements;size = bh->size;for(temp = data[index]; parentIndex(index) > 0; index = parent){parent = parentIndex(index);if(parent == 0 || temp > data[parent]) {break;}else {data[index] = data[parent]; }}data[index] = temp;}

總結

以上是生活随笔為你收集整理的二叉堆的操作总结（insert+deleteMin+increaseKey+decreaseKey+percolateDown+percolateUp）的全部內(nèi)容，希望文章能夠幫你解決所遇到的問題。

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