【 关关的刷题日记50】 Leetcode 345. Reverse Vowels of a String

class Solution {
public:
    string reverseVowels(string s) {
        if(s.empty() || s.size()==1)
            return s;
        for(int i=0, j=s.size()-1; i<j;)
        {
            while(!(tolower(s[i])=='a' || tolower(s[i])=='e' || tolower(s[i])=='i' || tolower(s[i])=='o' || tolower(s[i])=='u'))
                i++;
            while(!(tolower(s[j])=='a' || tolower(s[j])=='e' || tolower(s[j])=='i' || tolower(s[j])=='o' || tolower(s[j])=='u'))
                j--;
            if(i<j)
            {
                swap(s[i],s[j]);
                i++;
                j--;
            }
        }
        return s;
    }
};