将一句话的单词进行倒置，标点不倒置。比如I like beijing.经过函数后变为beijing like I

#include<stdio.h>

#include<string.h>

#include<assert.h>

void reverse(char*left,char*right)

{

 while(left<right)

 {

   char tmp = 0;

tmp = *left;

*left = *right;

*right = tmp;

left++;

right--;

 }

}

int main()

{

char arr[100] = {0};

int len = strlen(arr);

char *start = arr;

reverse(arr,arr+len-1);

gets(arr);

while(*start)

{

 char*end = start;

 while(*end !=' '&& *end !='\0')

 {

    end++;

 }

 reverse(start,end-1);

 if(*end == ' ')

 start = end+1;

 else

  start = end;

}

printf("%s\n",arr);

return 0;

}