palautetaan tuple

luennot/live23/Pallot/Pallot.cs

@@ -15,9 +15,9 @@ public class Pallot : PhysicsGame
     {
         double x = -200;
         PhysicsObject p = Luo(this, 100, 100);
-        PhysicsObject pallo = Lisaa(this, ref x);
+        (PhysicsObject pallo, x) = Lisaa(this, x);
         pallo.Color = Color.Yellow;
-        pallo = Lisaa(this, ref x);
+        (pallo, x) = Lisaa(this, x);
         Vaihda(pallo, Color.Red);
         Keyboard.Listen(Key.Escape, ButtonState.Pressed, ConfirmExit, "Lopeta peli");
     }
@@ -28,11 +28,10 @@ public class Pallot : PhysicsGame
         pallo.Color = c;
     }
 
-    public static PhysicsObject Lisaa(Game peli, ref double x)
+    public static (PhysicsObject, double) Lisaa(Game peli, double x)
     {
         double uusiX = x + 100;
-        x = uusiX;
-        return Luo(peli, uusiX, -200);
+        return (Luo(peli, uusiX, -200), uusiX);
     }