S12Exam1Solutions < CS101

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Solutions to the First Exam for CS 101 Spring 2012
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   1 E <hr />
   1 Below is one solution
<blockquote>World w = new World ();<br />Turtle t = new Turtle (w);<br />int index;<br /> <br />// draw red square<br />t.setPenColor (Color.RED);<br />index = 0;<br />while ( index &lt; 4 )<br />{<br /> t.forward (100);<br /> t.turn (-90);<br /> index = index + 1;<br />}<br /> <br />// move to the right to draw second square<br />t.penUp();<br />t.turn (90);<br />t.forward (100);<br />t.penDown();<br /> <br />// draw blue square<br />t.setPenColor (Color.BLUE);<br />index = 0;<br />while ( index &lt; 4 )<br />{<br />  t.forward (100);<br />  t.turn (-90);<br />  index = index + 1;<br />}<br /> <br />// display the world<br />w.show(); </blockquote> 
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  22. Below is one solution
<blockquote>
 public static void drawDecagon (Turtle t, int len, Color c)<br /> {<br />   Color saved = t.getPenColor ();<br />   t.setPenColor (c);<br />   <br />   int index;<br />   index = 0;<br />   while ( index &lt; 10 )<br />   {<br />     t.forward (len);<br />     t.turn ( 360/10 ); // 36 degree turn<br />     index = index + 1;<br />   }<br />   t.setPenColor (saved);<br /> }
</blockquote>
-- Main.troy - 2012-02-28

Topic revision: r1 - 2012-02-28 - 19:37:33 - Main.troy

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