345. Reverse Vowels of a String
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".
Note:
The vowels does not include the letter "y".
翻转字符串中的所有元音
find_first_of
如果在一个字符串str1中查找另一个字符串str2,如果str1中含有str2中的任何字符,则就会查找成功,而find则不同
C++(9ms):
1 class Solution { 2 public: 3 string reverseVowels(string s) { 4 int i = 0 ; 5 int j = s.size() - 1 ; 6 while(i < j){ 7 i = s.find_first_of("aeiouAEIOU",i) ; 8 j = s.find_last_of("aeiouAEIOU",j) ; 9 if (i < j){ 10 swap(s[i++],s[j--]) ; 11 } 12 } 13 return s ; 14 } 15 };