CS 111 - Fall 2013

Exam 1 Solutions

1. A
2. C
3. D
4. D
5. B
6. E
7. C
8. B
9. A
10. B
11. B
12. C
13. A
14. B
15. B
16. C
17. D
18. C
19. D
20. B
21. 
    public static void main (String[] args)
    {
    World w = new World ();
    Turtle t = new Turtle (w);
    int count;
    
    // draw blue square
    t.setPenColor(Color.BLUE);
    count = 0;
    while (count < 4)
    {
    t.forward (100);
    t.turn (90);
    count = count + 1;
    }
    
    // move turtle to the left.
    t.penUp();
    t.turn(-90);
    t.forward(200);
    t.turn(90);
    t.penDown();
    
    // draw red square
    t.setPenColor(Color.RED);
    count = 0;
    while (count < 4)
    {
    t.forward (100);
    t.turn (90);
    count = count + 1;
    }
    
    w.show();
    }
22. 
    public static void drawNonagon (Turtle t, int len, Color c)
    {
    Color origColor = t.getPenColor();
    t.setPenColor (c);
    int count;
    
    count = 0;
    while (count < 9)
    {
    t.forward (len);
    t.turn (360/9); // turn 40 degrees (360/numSides)
    count = count + 1;
    }
    
    t.setPenColor (origColor);
    }