java坐标移动题目case-凯发k8官方网

面向对象的思想 package com.special.spet;

import java.util.scanner;

/**

*

* @author special

* @date 2017年9月6日 下午5:35:09

*/

class point{

private int x;

private int y;

private static final char[] instruct_letter = {'a', 's', 'w', 'd'};

public int getx(){

return x;

}

public int gety(){

return y;

}

private static boolean contain(char ch){

for(char item : instruct_letter)

if(item == ch)

return true;

return false;

}

private static boolean isnum(char ch){

if(ch >= '0' && ch <= '9') return true;

else return false;

}

public static boolean isstandard(string instruct){

if(instruct.length() > 3 || !contain(instruct.charat(0))) { return false; }

for(int i = 1; i < instruct.length(); i )

if(!isnum(instruct.charat(i)))

return false;

return true;

}

/**

* 处理每一个指令，包括判断是否合格

* [@param instruct

* @return](/profile/547241) 一个待移动量的point对象

*/

public static point prestationofinstruct(string instruct){

point target = new point();

if(!isstandard(instruct)) {return target;}

int steps = integer.parseint(instruct.substring(1));

switch(instruct.charat(0)){

case 'a': target.x = -steps; break;

case 's': target.y = -steps; break;

case 'w': target.y = steps; break;

case 'd': target.x = steps; break;

}

return target;

}

/**

* 根据参数的移动量的target来进行相加(减法其实也是一种加法)

* @param target

*/

public void move(point target){

this.x = target.x;

this.y = target.y;

} [@override](/profile/992988) public string tostring(){

return x "," y;

}

}

public class pro16 {

public static void main(string[] args){

scanner input = new scanner(system.in);

while(input.hasnext()){

string str = input.nextline();

string[] instructs = str.split(";");

point origin = new point();

for(string instruct : instructs)

origin.move(point.prestationofinstruct(instruct));

system.out.println(origin);

}

}

}

进一步优化： package com.special.spet;

import java.util.scanner;

/**

*

* @author special

* @date 2017年9月6日 下午10:05:48

*/

class point{

private int x;

private int y;

public int getx(){

return x;

}

public int gety(){

return y;

}

public void setx(int x) {

this.x = x;

}

public void sety(int y) {

this.y = y;

}

@override

public string tostring(){

return x "," y;

}

}

public class pro16improve {

/**

* 利用空间存储指令的方向移量

*/

private static final string instruct_letter = "aswd";

private static final int[] distencex = {-1, 0, 0, 1};

private static final int[] distencey = {0, -1, 1, 0};

private static int find(char ch){

for(int i = 0; i < instruct_letter.length(); i ){

if(ch == instruct_letter.charat(i))

return i;

}

return -1;

}

private static boolean isnum(char ch){

if(ch >= '0' && ch <= '9') return true;

else return false;

}

public static void move(point point, string instruct){

if(instruct.equals("") || instruct.length() > 3 || find(instruct.charat(0)) == -1) { return ;}

int x = 0;

int y = 0;

for(int i = 1; i < instruct.length(); i ){

if(isnum(instruct.charat(i))){

// x,y上的移量为倍数乘以单位移量

x = x * 10 (instruct.charat(i) - '0') * distencex[find(instruct.charat(0))];

y = y * 10 (instruct.charat(i) - '0') * distencey[find(instruct.charat(0))];

}

else return;

}

point.setx(point.getx() x);

point.sety(point.gety() y);

}

public static void main(string[] args){

scanner input = new scanner(system.in);

while(input.hasnext()){

string str = input.nextline();

string[] instructs = str.split(";");

point origin = new point();

for(string instruct : instructs)

move(origin, instruct);

system.out.println(origin);

}

}

}

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