public class Book {
	String title;
	String author;
	int price;
	
	public Book() {
		title = "タイトル未設定";
		author = "著者未設定";
		price = 0;

	}	
	
	public Book(String title,String author,int price){
		
		this.title = title;
		this.author = author;
		this.price = price;
	}
}