建立一个类求该等式具体如图所示

Question

具体条件都在图片里了，就看看怎么编程或者有啥好思路的分享分享

Answer 1

#include <iostream>
#include <stdexcept>

class SP
{
public:
    SP(int n, int k) : _n(n), _k(k)
    {
        if (n < 1 || k < 1)
            throw std::invalid_argument("invalid n or k");
    }

    static int power(int m, int n)
    {
        int r = 1;
        for (int i = 1; i <= n; i++)
            r *= m;
        return r;
    }

    int fun() const
    {
        int s = 0;
        for (int i = 1; i <= _n; i++)
            s += power(i, _k);
        return s;
    }

    void show() const
    {
        std::cout << fun() << std::endl;
    }

private:
    int _n;
    int _k;
};

int main()
{
    try
    {
        int n, k;
        std::cin >> n >> k;
        SP s(n, k);
        s.show();
    }
    catch (const std::exception &e)
    {
        std::cerr << e.what() << '\n';
        return 1;
    }
    return 0;
}