Added ability to waddle

* Added location to the Foot class, initial value 0
* Added Foot::moveForward() to advance the location
* Moved the left and right foot forward in the waddle() function

Author: colabug

src/animals/Penguin.java

@@ -25,7 +25,7 @@ public Penguin( int age,
                     float rightFootLength,
                     float beakLength )
     {
-        System.out.println("Creating a penguin");
+        System.out.println( "Creating a penguin" );
 
         // Store values
         this.age = age;
@@ -38,4 +38,11 @@ public Penguin( int age,
         leftFoot = new Foot( rightFootLength );
         beak = new Beak( beakLength );
     }
+
+    public void waddle()
+    {
+        System.out.println( "Creating a penguin" );
+        leftFoot.moveForward();
+        rightFoot.moveForward();
+    }
 }

src/animals/parts/Foot.java

@@ -8,10 +8,17 @@
 public class Foot
 {
     float length;
+    int   location;
 
     public Foot( float length )
     {
-        System.out.println("Creating a foot");
+        System.out.println( "Creating a foot" );
         this.length = length;
+        location = 0;
+    }
+
+    public void moveForward()
+    {
+        location++;
     }
 }