sort_heap function in C++ Last Updated : 14 Aug, 2018 Comments Improve Suggest changes Like Article Like Report The sort_heap( ) is an STL algorithm which sorts a heap within the range specified by start and end. Sorts the elements in the heap range [start, end) into ascending order. The second form allows you to specify a comparison function that determines when one element is less than another. Defined in header It has two versions, which are defined below:. 1. Comparing elements using “<": Syntax: template void sort_heap(RandIter start, RandIter end); start, end : the range of elements to sort Return Value: Since, return type is void, so it doesnot return any value. Implementation template void sort_heap( RandIter start, RandIter end ); { while (start != end) std::pop_heap(start, end--); } 2. By comparing using a pre-defined function: Syntax: template void sort_heap(RandIter start, RandIter end, Comp cmpfn); start, end : the range of elements to sort comp: comparison function object (i.e. an object that satisfies the requirements of Compare) which returns ?true if the first argument is less than the second. Return Value : Since, its return type is void, so it doesnot return any value. Implementation template void sort_heap( RandIter start, RandIter end, Comp cmpfn ); { while (start != end) std::pop_heap(start, end--, cmpfn); } CPP // CPP program to illustrate // std::sort_heap #include <iostream> #include <algorithm> #include <vector> using namespace std; int main() { vector<int> v = {8, 6, 2, 1, 5, 10}; make_heap(v.begin(), v.end()); cout << "heap: "; for (const auto &i : v) { cout << i << ' '; } sort_heap(v.begin(), v.end()); std::cout <<endl<< "now sorted: "; for (const auto &i : v) { cout << i << ' '; } std::cout <<endl; } Output: heap: 10 6 8 1 5 2 now sorted: 1 2 5 6 8 10 Another Example : CPP // CPP program to illustrate // std::sort_heap #include <vector> #include <algorithm> #include <functional> #include <iostream> int main( ) { using namespace std; vector <int> vt1, vt2; vector <int>::iterator Itera1, Itera2; int i; for ( i = 1 ; i <=5 ; i++ ) vt1.push_back( i ); random_shuffle( vt1.begin( ), vt1.end( ) ); cout << "vector vt1 is ( " ; for ( Itera1 = vt1.begin( ) ; Itera1 != vt1.end( ) ; Itera1++ ) cout << *Itera1 << " "; cout << ")" << endl; sort_heap (vt1.begin( ), vt1.end( ) ); cout << "heap vt1 sorted range: ( " ; for ( Itera1 = vt1.begin( ) ; Itera1 != vt1.end( ) ; Itera1++ ) cout << *Itera1 << " "; cout << ")" << endl; } Output: vector vt1 is ( 5 4 2 3 1 ) heap vt1 sorted range: ( 1 2 3 4 5 ) Comment More infoAdvertise with us Next Article Heap Sort - Python S Shivani Ghughtyal Improve Article Tags : C++ DSA STL cpp-algorithm-library Practice Tags : CPPSTL Similar Reads Heap Sort - Data Structures and Algorithms Tutorials Heap sort is a comparison-based sorting technique based on Binary Heap Data Structure. It can be seen as an optimization over selection sort where we first find the max (or min) element and swap it with the last (or first). We repeat the same process for the remaining elements. In Heap Sort, we use 14 min read Iterative HeapSort HeapSort is a comparison-based sorting technique where we first build Max Heap and then swap the root element with the last element (size times) and maintains the heap property each time to finally make it sorted. Examples: Input : 10 20 15 17 9 21 Output : 9 10 15 17 20 21 Input: 12 11 13 5 6 7 15 11 min read Java Program for Heap Sort Heap sort is a comparison-based sorting technique based on the Binary Heap data structure. It is similar to the selection sort where first find the maximum element and place it at the end. We repeat the same process for the remaining element. Heap Sort in JavaBelow is the implementation of Heap Sort 3 min read C++ Program for Heap Sort Heap sort is a comparison-based sorting technique based on the Binary Heap data structure. It is similar to the selection sort where we first find the maximum element and place the maximum element at the end. We repeat the same process for the remaining element. Recommended PracticeHeap SortTry It! 3 min read sort_heap function in C++ The sort_heap( ) is an STL algorithm which sorts a heap within the range specified by start and end. Sorts the elements in the heap range [start, end) into ascending order. The second form allows you to specify a comparison function that determines when one element is less than another. Defined in h 3 min read Heap Sort - Python Heapsort is a comparison-based sorting technique based on a Binary Heap data structure. It is similar to selection sort where we first find the maximum element and place the maximum element at the end. 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It is similar to selection sort where we first find the maximum element and place the maximum element at the end. We repeat the same process for remaining element. We implement Heap Sort he 3 min read Sorting algorithm visualization : Heap Sort An algorithm like Heap sort can be understood easily by visualizing. In this article, a program that visualizes the Heap Sort Algorithm has been implemented. The Graphical User Interface(GUI) is implemented in Python using pygame library. Approach: Generate random array and fill the pygame window wi 4 min read Like