leetcode

0 class Solution {

1 bool is_vowel(char c) {

2 c = tolower(c);

3 return c == 'a' || c == 'e' || c == 'i' || c == 'o' || c == 'u';

4 }

5

6 public:

7 string reverseVowels(string s) {

8 int i = 0, j = size(s) - 1;

9 while (i < j) {

10 while (i < j && !is_vowel(s[i]))

11 i++;

12 while (i < j && !is_vowel(s[j]))

13 j--;

14 if (i >= j) break;

15 swap(s[i], s[j]);

16 i++;

17 j--;

18 }

19 return s;

20 }

21 };