斯坦福大学公开课编程方法学ASSIGNMENT

1、斯坦福大学公开课：编程方法学ASSIGNMENTS这个是根据Assig nment #1: Email and Karel the RobotKarel problems due: 1:15pm on Friday, April 12th ,2013自己写的代码，没有做过优化，这次的作业中Problem3的代码有问题，只能实现在大多数的世界中使用，在1XN这种会失效还没有修改，刚接触这门课程，还是挺有趣的，卡雷尔 机器人程序。我先声明了一个通用的类，然后再做的作业public class 通用 extends SuperKarelpublic void moveBackToWall()turn

2、Aro un d();while(fro ntlsClear()move();public void moveToWall()while(fro ntlsClear()move();public void moveBackward()turnAro un d();move();turnAro un d();public void turn Back()turnLeft();turnLeft();problem"/* File: CollectNewspaperKarel.java* At present, the CollectNewspaperKarel subclass does

3、 nothing.* Your job in the assignment is to add the necessary code to* instruct Karel to walk to the door of its house, pick up the* newspaper (represented by a beeper, of course), and then return* to its initial position in the upper left corner of the house.*/ public class CollectNewspaperKarel ex

4、tendsl用 public void run() moveToWall(); turnRight();move();turnLeft();move();pickBeeper();turnBack();move();turnRight();moveToWall();turnLeft(); moveToWall();putBeeper();turnBack();problem2public class UnitedNationsKarel extends 通用 public void run()while(fro ntlsClear()if(beepersPrese nt()pickBeeper

5、();buildHouse();if(fron tlsClear()move();private void buildHouse()getReady();build();fin ish();private void getReady()moveBackward();turnLeft();private void fini sh()turnLeft();private void build()buildPart();nextToWork();buildPart();getNext();buildPart();private void buildPart()putBeeper();move();p

6、utBeeper();move();putBeeper();private void n extToWork()move();turnRight();move();turnRight();private void getNext()turnAro un d(); nextToWork(); problem3/* * File: CheckerboardKarel.java * When you finish writing it, theCheckerboardKarel class should draw * a checkerboard using beepers, as describe

7、d in Assignment 1. You * should make sure that your program works for all of the sample * worlds supplied in the starter folder. */ public class CheckerboardKarel extends 通 用 public voidrun() while(leftlsClear() while(frontlsClear() putRow(); moveToNextStreet(); while(f rontlsClear() putRow(); check

8、Beeper(); privatevoidputRow() putBeeper(); if(frontIsClear() move(); if(frontIsClear() move(); private void moveToNextStreet() checkBeeper(); moveBackToWall(); moveForPutRow(); private voidcheckBeeper() moveBackward(); if(beepersPresent() else move(); putBeeper(); priva tevoidmoveForPutRow() turnRig

9、ht(); if(beepersPresent() move(); turnRight(); move(); else move(); turnRight(); problem4/* File: Midpoi ntFi ndi ngKarel.java* When you finish writing it, the MidpointFindingKarel class should* leave a beeper on the corner closest to the cen ter of 1st Street* (or either of the two cen tral corners

10、 if 1st Street has an even* nu mber of corn ers).Karel can put dow n additi onal beepers as it* looks for the midpo int, but must pick them up aga in before it* stops. The world may be of any size, but you are allowed to* assume that it is at least as tall as it is wide.*/ public class MidpointFindingKarel extends 通用 public void run()fullOfBeepers();while(beepersPrese nt()cha ngeForTake();take On eBeeper();turnAro un d();move();private void fullOfBeepers()putBeeper();while(fro ntlsClear()move();putBeeper();private void cha ngeForTake()moveToWall();turnAro un d();private void t