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—		it-artikel:my-solution-on-section1-cleaning-punchcards [2009-10-10 16:23] (aktuell) mail@awerner.homeip.net angelegt
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		+	====== My Solution on Section1 - Cleaning PunchCards ======
		+
		+
		+	This is my Solution of "Section1 - Cleaning PunchCards" from the [[http://see.stanford.edu/see/courseinfo.aspx?coll=824a47e1-135f-4508-a5aa-866adcae1111|Computer Science Course CS106A of Prof. Mehran Sahami]] at the [[http://www.stanford.edu|STANDFORD University]].
		+
		+	<code>
		+	/*
		+	* File: Section1.java
		+	* --------------------------------
		+	* Karel checks a punch card for half punched holes and cleans
		+	* those up. holes where the middle thingy is still existend
		+	* are considered as valid.
		+	*/
		+	import stanford.karel.*;
		+
		+	public class Section1 extends SuperKarel {
		+	/**
		+	* Specifies the program entry point.
		+	*/
		+	public void run() {
		+	while( frontIsClear() ) {
		+	move();
		+	checkAndCleanHole();
		+	move();
		+	}
		+	}
		+
		+	private void checkAndCleanHole() {
		+	/* This Method checks the current hole Karel is standing in and
		+	* cleans it up completly IF required.
		+	*
		+	*  pre-condition: karel sitting in the middle of a hole (on Y=3),
		+	*  facing EAST
		+	*
		+	*  post-condition: karel sitting in the middle of a hole (on Y=3),
		+	*  facing EAST
		+	*/
		+	if( noBeepersPresent() ) {
		+	cleanLeft();
		+	cleanRight();
		+	}
		+	}
		+
		+	private void cleanLeft() {
		+	/* This Method cleans the LEFT side of a Hole
		+	*
		+	*  pre-condition: karel sitting in the middle of a hole (on Y=3),
		+	*  facing EAST
		+	*
		+	*  post-condition: karel sitting in the middle of a hole (on Y=3),
		+	*  facing EAST
		+	*/
		+	turnLeft();
		+	move();
		+	pickAllBeepers();
		+	turnAround();
		+	move();
		+	turnLeft();
		+	}
		+
		+
		+	private void cleanRight() {
		+	/* This Method cleans the RIGHT side of a Hole
		+	*
		+	*  pre-condition: karel sitting in the middle of a hole (on Y=3),
		+	*  facing EAST
		+	*
		+	*  post-condition: karel sitting in the middle of a hole (on Y=3),
		+	*  facing EAST
		+	*/
		+	turnRight();
		+	move();
		+	pickAllBeepers();
		+	turnAround();
		+	move();
		+	turnRight();
		+	}
		+
		+	private void pickAllBeepers() {
		+	/* This Method picks up ALL Beepers at Karels actual position
		+	*/
		+	while( beepersPresent() ){
		+	pickBeeper();
		+	}
		+	}
		+	}
		+
		+	</code>