Add tests with stateless/static function

CM2005 Object Oriented Programming/Topic 5/5.2.1/test.cpp

@@ -0,0 +1,40 @@
+class Car
+{
+  public:
+    Car();
+    void accelerate();
+    static int whichIsFaster(Car carA, Car carB);
+  private:
+    float speed;
+};
+
+Car::Car() : speed(0.0f)
+{
+   
+}
+
+void Car::accelerate()
+{
+  speed += 0.5f;
+}
+
+int Car::whichIsFaster(Car carA, Car carB)
+{
+  if(carA.speed > carB.speed)
+  {
+    return 0;
+  }
+  return 1;
+}
+
+int main()
+{
+  Car car1{};
+  car1.accelerate();
+  // state of car1 - speed is 1.5
+  Car car2;
+  car2.accelerate();
+  car2.accelerate();
+  // static functions don't need to remember or access the state of the function
+  Car::whichIsFaster(car1, car2);
+}