将字符串反向

void reverse(const string& line)
{
    string result = " ";
    int i = 0;
    int k = 0;
    for (int j = 0; j < line.size(); j++)
    {
        if (line[j] == ‘ ‘)
        {
            k++;
            if (k == 1)//如果是第一个串，后面不要加空格
                result.insert(0, line.substr(i, j));
            else
            {   //否则后面加空格
                result.insert(0, line.substr(i, j - i + 1));
            }

            i = j + 1;
        }
        if (j == line.size() - 1)
        {
            //最后一个需要补空格
            result.insert(0, line.substr(i, j - i + 1) + " ");
        }
    }

    cout << result;
}

int main()
{

    string line;
    while (getline(cin,line))
    {
        reverse(line);
        cout << endl;
    }
    return 0;
}