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完成pop_heap

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邹晓航
2014-10-14 16:19:07 +08:00
parent e4b93ed49c
commit 023dd3a212
1 changed files with 22 additions and 15 deletions
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37
TinySTL/Algorithm.h
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@@ -73,19 +73,19 @@ namespace TinySTL{
} }
//********** [make_heap] *************** //********** [make_heap] ***************
//********* [Algorithm Complexity: O(N)] **************** //********* [Algorithm Complexity: O(N)] ****************
template<class RandomAccessIterator, class Compare> //template<class RandomAccessIterator, class Compare>
//heap<61><70><EFBFBD><EFBFBD><EFBFBD>㷨 ////heap<61><70><EFBFBD><EFBFBD><EFBFBD>㷨
static void up(RandomAccessIterator first, RandomAccessIterator last, Compare comp){//[first, last] //static void up(RandomAccessIterator first, RandomAccessIterator last, Compare comp){//[first, last]
if (first != last){ // if (first != last){
auto range = last - first + 1; // auto range = last - first + 1;
for (auto cur = last; rait > first; range /= 2){ // for (auto cur = last; rait > first; range /= 2){
auto parent = first + (range / 2 - 1); // auto parent = first + (range / 2 - 1);
if (comp(*parent, *cur)) // if (comp(*parent, *cur))
TinySTL::swap(*parent, *cur); // TinySTL::swap(*parent, *cur);
cur = parent; // cur = parent;
} // }
} // }
} //}
template<class RandomAccessIterator, class Compare> template<class RandomAccessIterator, class Compare>
//heap<61>½<EFBFBD><C2BD>㷨 //heap<61>½<EFBFBD><C2BD>㷨
static void down(RandomAccessIterator first, RandomAccessIterator last, static void down(RandomAccessIterator first, RandomAccessIterator last,
@@ -125,9 +125,16 @@ namespace TinySTL{
void push_heap(RandomAccessIterator first, RandomAccessIterator last, Compare comp); void push_heap(RandomAccessIterator first, RandomAccessIterator last, Compare comp);
//********* [pop_heap] *************** //********* [pop_heap] ***************
template <class RandomAccessIterator> template <class RandomAccessIterator>
void pop_heap(RandomAccessIterator first, RandomAccessIterator last); void pop_heap(RandomAccessIterator first, RandomAccessIterator last){
TinySTL::pop_heap(first, last,
TinySTL::less<typename TinySTL::iterator_traits<RandomAccessIterator>::value_type>());
}
template <class RandomAccessIterator, class Compare> template <class RandomAccessIterator, class Compare>
void pop_heap(RandomAccessIterator first, RandomAccessIterator last, Compare comp); void pop_heap(RandomAccessIterator first, RandomAccessIterator last, Compare comp){
TinySTL::swap(*first, *(last - 1));
if (last - first >= 2)
down(first, last - 2, first, comp);
}
//********* [sort_heap] *************** //********* [sort_heap] ***************
template <class RandomAccessIterator> template <class RandomAccessIterator>
void sort_heap(RandomAccessIterator first, RandomAccessIterator last); void sort_heap(RandomAccessIterator first, RandomAccessIterator last);