initial

swap2.cpp

@@ -0,0 +1,20 @@
+#include <iostream>
+
+using namespace std;
+
+void swap2 (int &val1, int &val2) {
+    int temp = val1;
+    val1 = val2;
+    val2 = temp;
+  }
+
+int main (void) {
+  int x = 1;
+  int y = 3;
+
+  swap2(x, y);
+
+  cout << x << y << endl;
+
+  return 0;
+}