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Help with simple program

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Join Date: Aug 2008

Posts: 21

Reputation: Tootlol is an unknown quantity at this point

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Tootlol

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Help with simple program

Sep 10th, 2008

Basically, I am trying to solve a problem a textbook. The book requires me to use karel J robot to develop programming principles. So the problem is correctly the following code so that the robot will do this: attached

This is the code I am suppose to fix. Currently the robot moves in a straight direction and doesn't turn. I do not know why. Please give me some hints, any help could be appreciated.

 Help with Code Tags 
 java Syntax (Toggle Plain Text) 
import cs1Lib.karel.Robot;
import cs1Lib.karel.World;
 
public class PlantSquare extends Object
{ 
   public static void main(String[] args)
   {  World world = new World();
 
      Robot karel = new Robot(12);
      world.addRobot(karel, 1, 1, World.EAST);
 
      int side = 0;
      while (side < 4)
      {  
 
 
         int step = 0;
         while (step < 3)
         {  
 
           karel.move(); 
           karel.putBeeper();
 
         }
             karel.turnLeft();
      }
      karel.turnOff();
 
   }
}
import cs1Lib.karel.Robot;
import cs1Lib.karel.World;
 
public class PlantSquare extends Object
{ 
   public static void main(String[] args)
   {  World world = new World();
    
      Robot karel = new Robot(12);
      world.addRobot(karel, 1, 1, World.EAST);

      int side = 0;
      while (side < 4)
      {  


         int step = 0;
         while (step < 3)
         {  
                   
           karel.move(); 
           karel.putBeeper();

         }
             karel.turnLeft();
      }
      karel.turnOff();

   }
}

Last edited by cscgal; Sep 11th, 2008 at 2:04 am. Reason: Added code tags

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Join Date: Oct 2006

Posts: 1

Reputation: inprobable is an unknown quantity at this point

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inprobable inprobable is offline

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Re: Help with simple program

Sep 10th, 2008

Your while loops don't have any end to them. The first one would execute the second one, and since the second loop never ends, the code

 Help with Code Tags 
 Java Syntax (Toggle Plain Text) 
karel.turnLeft()
karel.turnLeft()

never gets used. Try making the loops end so the other code can start.

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Join Date: Apr 2008

Posts: 160

Reputation: dmanw100 is on a distinguished road

Solved Threads: 12

dmanw100

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Re: Help with simple program

Sep 10th, 2008

I think its because you never increase the step integer so karel never stops the karel.move(); and karel.putBeeper(); routine. If the move(); method doesnt increase the step counter, then karel will never exit. Put something like step = step + 1; in the while loop to see if that fixes your problem.