©TCP-tryC++

#include <iostream>
using namespace std;

class Book
{
private:
	int current_page_;
	void set_percent();
public:
	Book(const string& title = "웹 프로그래밍", int total_page = 100);
	string title_;
	int total_page_;
	double percent_;
	void Move(int page);
	void Open();
	void Read();
};

int main(void)
{
	Book web_book;	// 디폴트 생성자의 암시적 호출
	// 생성자가 호출되어 멤버 변수인 percent_가 초기화되었는지를 확인함. 
	cout << web_book.percent_;
	return 0;
}

Book::Book(const string& title, int total_page)
{
	title_ = title;
	total_page_ = total_page;
	current_page_ = 0;
	set_percent();
}

void Book::set_percent()
{
	percent_ = (double) current_page_ / total_page_ * 100;
}