From 4ef9a1c612d88906df0caf9fd38bbcac883fec4a Mon Sep 17 00:00:00 2001
From: Shweta <2002shwetarani@gmail.com>
Date: Fri, 22 Oct 2021 21:47:50 +0530
Subject: [PATCH] Created heap sort cpp

---
 heap_sort.cpp | 63 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 heap_sort.cpp

diff --git a/heap_sort.cpp b/heap_sort.cpp
new file mode 100644
index 0000000..7b6b13d
--- /dev/null
+++ b/heap_sort.cpp
@@ -0,0 +1,63 @@
+#include <iostream>
+
+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 (l < n && arr[l] > arr[largest])
+		largest = l;
+
+	
+	if (r < n && arr[r] > arr[largest])
+		largest = r;
+
+	
+	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);
+	}
+}
+
+
+void printArray(int arr[], int n)
+{
+	for (int i = 0; i < n; ++i)
+		cout << arr[i] << " ";
+	cout << "\n";
+}
+
+
+int main()
+{
+	int arr[] = { 12, 11, 13, 5, 6, 7 };
+	int n = sizeof(arr) / sizeof(arr[0]);
+
+	heapSort(arr, n);
+
+	cout << "Sorted array is \n";
+	printArray(arr, n);
+}