/***author：Kevin*date:2011-07-17*function:The problem of Mars car.
*China firmly opposes Obama-Dalai meeting *The WAR is actually begun!Now you are the Commander of the Fleet.*You can input command to control the Mars Car to go straight,*turn left,turn right,and the car maybe your loyal soldier.*The command input like this string:LL1LRR89L2,*and at last report the location of the car to Commander.*L means turn left,R means turn right,number0-9 means how far the car can go *request:1).ExtremeProgramming 2).Pair Programming 3).Test Driven Development*/
import java.io.BufferedReader;import java.io.InputStreamReader;import java.util.Scanner;
public class TestMarsCar {
public static void main(String[] args) throws Exception {
BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));System.out.println("Now,the Mars car is loarding on the Mars,input the loaction");System.out.println("input x:(number)");String x = bf.readLine();System.out.println("input y:(number)");String y = bf.readLine();System.out.println("input direction:(N,W,S,E)");String f = bf.readLine();System.out.println("the car is loaded in (" + x + "," + y + "," + f+ ")");// create Marscar objectMarscar car = new Marscar(x, y, f);
while (true) {System.out.println("\n***********************"+ "\npress 1or 2 to select *" + "\n1:new command *"+ "\n2:exit *"+ "\n***********************\ninput number:");Scanner s1 = new Scanner(System.in);int ints1 = Integer.parseInt(s1.next());if (ints1 == 1) {System.out.println("input new command like (L,R,0-9):");
Scanner s = new Scanner(System.in);String commands = s.next();for (int i = 0; i < commands.length(); i++) {String command = String.valueOf(commands.charAt(i));
if (command.equals("L")) {car.turnLeft(car.getF());} else if (command.equals("R")) {car.goRight(car.getF());} else {int n = Integer.parseInt(command);car.goAhead(n);}// show the location of mars car.System.out.println("the new location is (" + car.getX()+ "," + car.getY() + "," + car.getF() + ")");
}} else if (ints1 == 2) {System.exit(0);} else {System.out.println("YOu command is Wrong!");}}}}
// -----------------------------------------// class Marscarclass Marscar {private String x; // x-coordinateprivate String y; // Y-coordinateprivate String f; // direction
public String getX() {return x;}
public void setX(String x) {this.x = x;}
public String getY() {return y;}
public void setY(String y) {this.y = y;}
public String getF() {return f;}
public void setF(String f) {this.f = f;}
// constructorpublic Marscar(String x, String y, String f) {this.x = x;this.y = y;this.f = f;}
public void turnLeft(String f) {System.out.println("go left");if (f.equals("N")) {setF("W");} else if (f.equals("E")) {setF("N");} else if (f.equals("S")) {setF("E");} else if (f.equals("W")) {setF("S");}}
public void goRight(String f) {System.out.println("go right");if (f.equals("N")) {setF("E");} else if (f.equals("E")) {setF("S");} else if (f.equals("S")) {setF("W");} else if (f.equals("W")) {setF("N");}}
// input number to control how far the car go aheadpublic void goAhead(int n) {int intx = Integer.parseInt(x);int inty = Integer.parseInt(y);if (this.getF().equals("N")) {intx += n;} else if (this.getF().equals("E")) {inty += n;} else if (this.getF().equals("S")) {intx -= n;} else if (this.getF().equals("W")) {inty -= n;}this.x = String.valueOf(intx);this.y = String.valueOf(inty);}}
