https://leetcode.cn/problems/reverse-string/description/

<aside> 💡

简单的一道题，利用数组双指针的思路做就可以

</aside>

// 数组思路（双指针法）
void reverseString(vector<char>& s) {
	char temp = ' ';
	for (int i = 0; i < s.size() - i - 1; ++i) {
		temp = s[s.size() - i - 1];
		s[s.size() - i - 1] = s[i];
		s[i] = temp;
	}
}

void reverseString(vector<char>& s) {
    int left = 0;
    int right = s.size() - 1;

    while (left < right) {
        char tmp = s[right];
        s[right--] = s[left];
        s[left++] = tmp;
    }
}

使用swap库函数

void reverseString(vector<char>& s) {
	for (int left = 0, right = s.size() - 1; left < right; ++left, --right)
		std::swap(s[left], s[right]);
}