클래스 Point, ColorPoint (클래스 상속)

1.

#include <iostream>
#include <string>
using namespace std;
class Point {
	int x, y;
public:
	Point(int x, int y) { this->x = x; this->y = y; }
	int getX() { return x; }
	int getY() { return y; }
protected:
	void move(int x, int y) { this->x = x; this->y = y; }
};
class ColorPoint : public Point {
	string color;
public:
	ColorPoint(int x, int y, string color);
	void setPoint(int x, int y) { move(x, y); }
	void setColor(string color) { this->color = color; }
	void show() {
		cout << color << "색으로" << " (" << getX() << "," << getY() << ")에 위치한 점입니다." << endl;
	}
};
ColorPoint::ColorPoint(int x, int y, string color) :Point(x, y) { this->color = color; }

int main()
{
	ColorPoint cp(5, 5, "RED");
	cp.setPoint(10, 20);
	cp.setColor("BLUE");
	cp.show();
}

 

2.

#include <iostream>
#include <string>
using namespace std;
class Point {
	int x, y;
public:
	Point(int x, int y) { this->x = x; this->y = y; }
	int getX() { return x; }
	int getY() { return y; }
protected:
	void move(int x, int y) { this->x = x; this->y = y; }
};
class ColorPoint : public Point {
	string color;
public:
	ColorPoint(int x = 0, int y = 0, string color = "BLACK");
	void setPoint(int x, int y) { move(x, y); }
	void setColor(string color) { this->color = color; }
	void show() {
		cout << color << "색으로" << " (" << getX() << "," << getY() << ")에 위치한 점입니다." << endl;
	}
};
ColorPoint::ColorPoint(int x, int y, string color) :Point(x, y) { this->color = color; }

int main()
{
	ColorPoint zeroPoint;
	zeroPoint.show();

	ColorPoint cp(5, 5);
	cp.setPoint(10, 20);
	cp.setColor("BLUE");
	cp.show();
}