LeetCode 557. Reverse Words in a String III （字符串翻转）

Given a string, you need to reverse the order of characters in each word within a sentence while still preserving whitespace and initial word order.

Example 1:

Input: "Let's take LeetCode contest"Output: "s'teL ekat edoCteeL tsetnoc"

Note: In the string, each word is separated by single space and there will not be any extra space in the string.

按单词翻转字符串。要点在\0和size()的判断和处理，以及最后的空格的处理。

    string reverseWords(string s) {        string str = "";        string tmp="",tmp2="";        int nCrt= 0;        while(nCrt<s.size())        {        tmp="";        while(s[nCrt]!=' '&& nCrt<s.size())        {       tmp+=s[nCrt];     nCrt++;        }        nCrt++;        tmp2=tmp;        for(int i=0;i<tmp.size();i++)        {        tmp2[i] = tmp[tmp.size()-1-i];        }        str+=tmp2;        if(nCrt<=s.size()-1)    str+=" ";        }        return str;    }