翻转句子中单词的顺序

题目：输入一个英文句子，翻转句子中单词的顺序，但单词内字符的顺序不变。句子中单词以空格符隔开。为简单起见，标点符号和普通字母一样处理。

例如输入“I am a student.”，则输出“student. a am I”。

 

 

#include<stdlib.h>

#include<iostream>

#include<stdio.h>

#include<vector>

#include<time.h>

#include<set>

#include<map>

#include<assert.h>

#include<string.h>

#include<stack>

#include<set>

using namespace std;

 

int main()

{

     

    char str[50005];

    while(gets(str))

    {

         

        int len=strlen(str);

        int s;

        bool sf=true;

        for(int i=len-1;i>=0;i--)

        {

            if(str[i]==' ')

            {

                if(sf==true)

                  printf(" ");

                else

                {

                 //

                    for(int j=i+1;j<=s;j++)

                        printf("%c",str[j]);

                    sf=true;

                    printf(" ");

                }

            }

            else

            {

                if(sf==true)

                {

                    sf=false;

                    s=i;

                }

                if(i==0)

                {

                  for(int j=i;j<=s;j++)

                        printf("%c",str[j]);

                }

            }

        }

        printf("\n");

    }

}

/**************************************************************

    Problem: 1361

    User: billforum

    Language: C++

    Result: Accepted

    Time:300 ms

    Memory:1512 kb

****************************************************************/