#pragma once

#include <iostream>
#include <functional>
#define SOL_NUM 2

typedef std::function<int(int, int)> func_t;

int Add(int x, int y)
{
	return x + y;
}
int Sub(int x, int y)
{
	return x - y;
}

func_t sol[SOL_NUM] = {Add, Sub};

class Task
{
public:
	Task(){}
	Task(int x, int y, func_t func)
	: _x(x)
	, _y(y)
	, _func(func)
	{}
	int operator()()
	{
		int res = _func(_x, _y);
		std::cout << "结果是: " << res << std::endl;
	}
public:
	int _x;
	int _y;
	
	func_t _func;
};