leetcode 541. 反转字符串 II

我的解答

#include <bits/stdc++.h>
using namespace std;

class Solution
{
    size_t m_len { 0 };
public:

    string reverseStr(string s, int k)
    {
        m_len = s.size();
        for (size_t i = 0; i < m_len; i += 2 * k)
        {
            reverseStr(s, i, i + k - 1);
        }
        return s;
    }
    void reverseStr(string &s, size_t left, size_t right)
    {
        if (right >= m_len)
        {
            right = m_len - 1;
        }
        while (left < right)
        {
            swap(s[left], s[right]);
            ++left, --right;
        }
    }
};

int main()
{
    string str { "abcdefg" };
    Solution s;
    cout << s.reverseStr(str, 2) << endl;
}
// g++ test.cpp -pedantic -Wall -Wextra --std=c++11