Merge pull request #1784 from rohit85-it/patch-1

Binary search program in cpp

Program's_Contributed_By_Contributors/C++/binarySearch.cpp

@@ -0,0 +1,31 @@
+// C++ program to implement recursive Binary Search
+#include <bits/stdc++.h>
+using namespace std;
+
+int binarySearch(int arr[], int l, int r, int x)
+{
+	if (r >= l) {
+		int mid = l + (r - l) / 2;
+
+		if (arr[mid] == x)
+			return mid;
+
+		if (arr[mid] > x)
+			return binarySearch(arr, l, mid - 1, x);
+
+		return binarySearch(arr, mid + 1, r, x);
+	}
+	return -1;
+}
+
+int main(void)
+{
+	int arr[] = { 2, 3, 4, 10, 40 };
+	int x = 10;
+	int n = sizeof(arr) / sizeof(arr[0]);
+	int result = binarySearch(arr, 0, n - 1, x);
+	(result == -1)
+		? cout << "Element is not present in array"
+		: cout << "Element is present at index " << result;
+	return 0;
+}