selection_sort.cpp: Add cpp implementation for selection sort.

This commit adds the Cpp implementation of selection sort for NITSkmOS/Algorithms.

closes NITSkmOS#482

selection_sort/Cpp/selection_sort.cpp

@@ -0,0 +1,33 @@
+#include <iostream>
+using namespace std;
+
+void selection_sort(int[], int);
+
+int main(){
+	int n, arr[100];
+	cout << "Enter the length of the array (less than 100)- ";
+	cin >> n;
+	cout << "Enter space separated " << n << " numbers- ";
+	for(int i = 0;i < n; i++){
+		cin >> arr[i];
+	}
+	selection_sort(arr, n);
+	cout << "Sorted array after selection sort algorithm- ";
+	for(int i = 0; i < n; i++){
+		cout << arr[i] << " ";
+	}
+	cout << endl;
+	return 0;
+}
+
+void selection_sort(int arr[], int n){
+	int i, j, temp;
+	for(i = 0; i < n; i++)
+		for(j = i+1; j < n; j++){
+			if(arr[i]>arr[j]){
+				temp = arr[i];
+				arr[i] = arr[j];
+				arr[j] = temp;
+			}
+		}
+}