From 9b45ee23d3b8f6396401b52c2af6b8ccbf8981ea Mon Sep 17 00:00:00 2001
From: Jayshah-JS1312 <55508873+Jayshah-JS1312@users.noreply.github.com>
Date: Sat, 12 Oct 2019 16:59:19 +0530
Subject: [PATCH] HeapSort program in c++

---
 data_structures/sortings/HeapSort.cpp | 42 +++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 data_structures/sortings/HeapSort.cpp

diff --git a/data_structures/sortings/HeapSort.cpp b/data_structures/sortings/HeapSort.cpp
new file mode 100644
index 0000000..5517363
--- /dev/null
+++ b/data_structures/sortings/HeapSort.cpp
@@ -0,0 +1,42 @@
+#include <iostream> 
+#include<algorithm>
+#include<vector>
+  
+using namespace std; 
+void heapify(int arr[], int n, int i) 
+{ 
+    int largest = i; 
+    int l = 2*i + 1; 
+    int r = 2*i + 2;
+    if (r < n && arr[r] > arr[largest]) 
+        largest = r; 
+    if (l < n && arr[l] > arr[largest]) 
+        largest = l; 
+    if (largest != i) 
+    { 
+        swap(arr[i], arr[largest]); 
+        heapify(arr, n, largest); 
+    } 
+} 
+void heapSort(int arr[], int n) 
+{ 
+    for (int i = n / 2 - 1; i >= 0; i--) 
+        heapify(arr, n, i); 
+    for (int i=n-1; i>=0; i--) 
+    {
+        swap(arr[0], arr[i]); 
+        heapify(arr, i, 0); 
+    } 
+} 
+int main() 
+{ 
+    int arr[] = {12, 14, 2, 3, 9, 8}; 
+    int n = sizeof(arr)/sizeof(arr[0]); 
+  
+    heapSort(arr, n); 
+  
+    cout << "Array after sorting is: \n"; 
+    for (int i=0; i<n; ++i) 
+        cout << arr[i] << " "; 
+    cout << "\n"; 
+}