1.描述
Write a function that takes a string as input and returns the string reversed.
Example:
Given s = "hello", return "olleh".
2.分析
3.代碼
class Solution {
public:
string reverseString(string s) {
if (s.size() == 0 || s.size() == 1) return s;
int low = 0, high = s.size() - 1;
while (low < high) {
swap(s[low++], s[high--]);
}
return s;
}
};
