Add Oving 0

Oving 0/old_hello.cpp

@@ -0,0 +1,8 @@
+// old_hello.cpp
+#include "std_lib_facilities.h"
+
+int main(){
+	cout << "The rather old \"Hello, World!\" message\n";
+	// keep_window_open(); // Not needed when using project template TDT4102_std_lib_facilities 
+	return 0;
+}