557.go

package main

import (
	"fmt"
)

func main() {
	fmt.Println(reverseWords("Let's take LeetCode contest"))
}

//给定一个字符串，你需要反转字符串中每个单词的字符顺序，同时仍保留空格和单词的初始顺序。
//
//示例 1:
//
//输入: "Let's take LeetCode contest"
//输出: "s'teL ekat edoCteeL tsetnoc"
//注意：在字符串中，每个单词由单个空格分隔，并且字符串中不会有任何额外的空格。

//reverse-words-in-a-string-iii
func reverseWords(s string) string {
	startS := 0
	var reverseS string
	for i := range s {
		if s[i] == 32 || i == len(s)-1 {
			tmpWord := ""
			if s[i] == 32 {
				tmpWord = s[startS:i]
				reverseS = reverseS + Reverse(tmpWord) + " "
			} else {
				tmpWord = s[startS:]
				reverseS = reverseS + Reverse(tmpWord)
			}
			startS = i+1
		}
	}
	return reverseS
}

func Reverse(s string) string {
	r := []rune(s)
	for i, j := 0, len(r)-1; i < j; i, j = i+1, j-1 {
		r[i], r[j] = r[j], r[i]
	}
	return string(r)
}