bubble_sort.cpp: Optimize the C++ code

Replaced use of stdio.h by much safer iostream header file
Replaced printf statements by std::cout statements.

Closes #240

Author: SaashaJoshi

bubble_sort/Cpp/bubble_sort.cpp

@@ -1,4 +1,5 @@
-#include <stdio.h>
+#include <iostream>
+using namespace std;
 
 void swap(int *xp, int *yp) {
 	int temp = *xp;
@@ -17,8 +18,6 @@ void bubble_sort(int arr[], int n) {
 				swapped = true;
 			}
 		}
-
-		// If no two elements were swapped by inner loop, then break
 		if (swapped == false)
 			break;
 	}
@@ -28,17 +27,16 @@ void bubble_sort(int arr[], int n) {
 void print_array(int arr[], int size) {
 	int i;
 	for (i = 0; i < size; i++)
-		printf("%d ", arr[i]);
-
-	printf("\n");
+		cout << arr[i] << " ";
+	cout << endl;
 }
 
 // Driver program to test above functions
 int main() {
 	int arr[] = {64, 34, 25, 12, 22, 11, 90};
 	int n = sizeof(arr) / sizeof(arr[0]);
 	bubble_sort(arr, n);
-	printf("Sorted array: \n");
+	cout << "Sorted array: " << endl;
 	print_array(arr, n);
 	return 0;
 }