10.2 구성관계 composition

#pragma once
#include <string>
#include "Position2D.h"

class Monster
{
private:
    std::string m_name;
    Position2D m_location;
    //int m_x;
    //int m_y; // 몬스터 위치
    
public:
    Monster(const std::string name_in, const Position2D & pos_in)
        : m_name(name_in), m_location(pos_in)
    {}
    
    void moveTo(const Position2D & pos_target)
    {
        m_location.set(pos_target);
        //m_x = x_target;
        //m_y = y_target;
    }
    
    friend std::ostream & operator << (std::ostream & out, const Monster & monster)
    {
        //out << monster.m_name << " " << monster.m_x << " " << monster.m_y << "\n";
        out << monster.m_name << " " << monster.m_location;
        return out
    }
    
};

#pragma once
#include <iostream>

class Position2D
{
private:
    int m_x;
    int m_y;
    
public:
    Position2D(const int & x_in, const int & y_in)
        : m_x(x_in), m_y(y_in)
    {}
    
    void set(const Poisition2D & pos_target)
    {
        set(pos_target.m_x, pos_target.m_y);
        // m_x = pos_target.m_x; 아래 함수를 재활용하는게 좋다.
        // m_y = pos_target.m_y;
    }
    
    
    void set(const int & x_target, const int & y_target)
    {
        m_x = x_target;
        m_y = y_target;
    }
    
    friend std::ostream & operator << (std::ostream & out, const Position2D & pos2d)
    {
        out << Position2D.m_x << " " << Position2D.m_y;
        return out
    }
    
}

#include "Monster.h"

using namespace std;

int main()
{
	//Monster mon1("Sanson", 0, 0);
    Monster mon1("Sanson", Position2D(0,0));
    
    mon1.m_location
    
    cout << mon1 << "\n";
    
    while(1) // game loop
    {
        //event
        mon1.moveTo(Position2D(1, 1));
        cout << mon1 << "\n";
    }
    
    return 0;
}