func reverseWords(s string) string {
 var reverseSeg []string
 //获取去除空格后的单词数组
 seg := strings.Fields(s)
 //翻转单词数组
 for i := len(seg)-1;i>=0;i-- {
  reverseSeg = append(reverseSeg,seg[i])
 }
 //数组-》由空格间隔的字符串
 return strings.Join(reverseSeg," ")
}

func reverseWords(s string) string {
 var result string
 //获取去除空格后的单词数组
 str := strings.Split(s," ")
 //倒序组装单词和空格
 for i:=len(str)-1;i>=0;i-- {
  if len(str[i])==0 {
   continue
  }
  result += str[i]+" "
 }
 if len(result)==0 {
  return ""
 }
 return result[:len(result)-1]
}

func reverseWords(s string) string {
 sL := strings.Split(s, " ")
 c := len(sL)
 n := 0//表示实际有效单词的长度
 i := 0//数组长度
 for {
 if i >= c {
 break
 }
 if sL[i] == "" {
 i++
 continue
 } else {
 //将有效单词前移
 sL[n], sL[i] = sL[i], sL[n]
 n++
 i++
 }
 }
 //翻转有效单词
 for i := 0; i < n/2; i++ {
 sL[i], sL[n-i-1] = sL[n-i-1], sL[i]
 }
 //返回由空格间隔的有效单词字符串
 return strings.Join(sL[:n], " ")
}

package main

import "fmt"

func main() {

 src := "你好啊,XXX啊啊啊啊"
 dst := reverse([]rune(src))
 fmt.Println("result is:",string(dst))
}

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

package main

import "fmt"

func main() {

 src := "你好啊,XXX啊啊啊啊"
 dst := reverse([]byte(src))
 fmt.Println("result is:",string(dst))
}

func reverse(s []byte) []byte {
 for i,j :=0,len(s)-1;i<j;i,j = i+1,j-1{
 s[i],s[j] = s[j],s[i]
 }
 return s
}