8부 (클래스) 종합문제 - 1

https://www.youtube.com/watch?v=A5QdMcTe_Hg&list=PLlJhQXcLQBJqywc5dweQ75GBRubzPxhAk&index=68 

문제1.

//다음 프로그램의 출력 결과는?

#include <iostream>

using namespace std;

int n = 0;
namespace A {
	int n = 0;
	namespace B {
		void set() { n = 10; }
		int n = 0;
	}
}

namespace C {
	void set();
	int n = 0;
}

void C::set() { n = 20; }

int main() {
	using namespace A::B;

	set();
	C::set();

	cout << ::n << endl;
	cout << A::n << endl;
	cout << A::B::n << endl;
	cout << C::n << endl; 
}

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

정답1.

0

10

0

20

 

 

 

문제2.

/*
아래의 GameWindow 클래스의 코드에서 창 너비와 높이를 매개변수로 받는 ResizeWindow 함수를 추가하여
다음 조건과 같이 width와 height의 값을 바꿀 수 있도록 하세요.
- 들어온 매개변수의 값과 일치하도록 창 크기를 설정할 것.
- 너비가 800보다 작거나 높이가 600보다 작을 때는 각각 800, 600으로 설정할 것

2. GameWindow::GameWindow(int w, int h) 생성자도 마찬가지로 2번의 조건을 만족하도록 수정하세요.

3. 작성한 코드에서 상수화가 가능한 부분을 모두 상수화하세요.
*/

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

정답2.

#include <iostream>

#include <iostream>

using namespace std;

class GameWindow {
public:
	GameWindow();
	GameWindow(const int,const int);

	int GetWidth() const;
	int GetHeight() const;

	void ResizeWindow(const int, const int);

private:
	int width;
	int height;
};

GameWindow::GameWindow() : width(800), height(600) { }
GameWindow::GameWindow(const int w,const int h) {
	ResizeWindow(w, h);
}
void GameWindow::ResizeWindow(const int w, const int h) {
	if (w < 800) width = 800;
	else width = w;

	if (h < 600) height = 600;
	else height = h;
}
int GameWindow::GetWidth() const { return width; }
int GameWindow::GetHeight() const { return height; }

int main() {
	GameWindow mainWindow;
	mainWindow.ResizeWindow(1366, 768);
	cout << mainWindow.GetWidth() << "x" << mainWindow.GetHeight() << endl;
}