CS 101 - 9/8/11

Basic Input

    SimpleInput class

       SimpleInput.getIntNumber () returns a value

    We use an assignment statement  to store the
      returned value into a variable so our program
      can uses the value entered by the user.

    int value1;

    value1 = SimpleInput.getIntNumber("Enter an Integer");

Chapter 3 in the Text

  Turtle Drawings - we get to control a turtle with
    a pen attached to its back to draw some pictures.

  Step 1.  Create the world for the turtle

       World w;            // create the memory for the world
       w = new World ();   // initialize the memory space

  Step 2.  Create the turtle to live in that world

       Turtle t;            // create the memory for the turtle
       t =  new Turtle (w); // initialize the memory and specify
                            // the world where the turtle will
                            // exist


 Basic Turtle Operations

     forward(int pixels);
     forward();             // move forward 100 pixels
     turn (int degrees);    // rotate clockwise
     turnRight();
     turnLeft();
     
     setPenWidth(int thickness);

     setPenColor (Color c);  // Color is defined in a
                             //  standard Java library