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【LeetCode】345. Reverse Vowels of a String 解题小结

题目:

Write a function that takes a string as input and reverse only the vowels of a string.

Example 1:
Given s = "hello", return "holle".

Example 2:
Given s = "leetcode", return "leotcede".

 应该算不上有难度。

class Solution {public:    string reverseVowels(string s) {        string str = s;        for (int i = 0, j = str.size() - 1; i < j; )        {            if (isVowel(str[i]) && isVowel(str[j])) {                char tmp = str[i];                str[i] = str[j];                str[j] = tmp;                i++;                j--;            }            if ( !isVowel(str[i]))++i;            if ( !isVowel(str[j])) --j;        }        return str;    }    bool isVowel(char c) {        if (c == a || c == e || c == i || c == u || c == o         || c == A || c == E || c == I || c == U || c == O) return true;        return false;    }};

 

【LeetCode】345. Reverse Vowels of a String 解题小结