345. Reverse Vowels of a String

问题描述

解决方案

class Solution {
public:
    string reverseVowels(string s) {
        string vowels("aeiouAEIOU");
        string::size_type begin=0;
        string::size_type end=s.size();
        while(begin!=string::npos)
        {
            begin=s.find_first_of(vowels,begin);
            end=s.find_last_of(vowels,end);
            if(begin>=end)  break;   
            swap(s[begin],s[end]);
            ++begin;
            --end; 
        }
        return s;
    }
};