[OJ]: Reverse Words in a String

Reverse Words in a String

需求说明

Given an input string, reverse the string word by word.

For example,

Given s = "the sky is blue",

return "blue is sky the".

大致题意

输入一个字符串并翻转这个字符串.

举例,

给定一个字符串"the sky is blue"

返回字符串"blue is sky the"

实现方法

Python

#!/bin/env pythonstring = raw_input('Please input a string: ')print " ".join(string.split()[::-1])

Perl

#!/bin/env perluse strict;use warnings;print "Please input a string: ";my $string = <STDIN>;print join(' ',reverse(split(' ',$string)))."\n";

Java

import java.util.Scanner;public class reverseString {    public static void main(String[] args) {        Scanner console = new Scanner(System.in);        System.out.print("Please input a string:");        String[] string = console.nextLine().split(" ");        StringBuilder result = new StringBuilder();        for (int i = string.length - 1; i >= 0; --i) {            result.append(string[i]).append(" ");        }        String reverse =  result.substring(0, result.length()-1);        System.out.println(reverse);    }}

通过上述例子可以看出perl、python处理文本的强大之处.

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