package?com.imooc_1;

import?java.util.Scanner;

public?class?BorrowBooks?{
	public?static?Scanner?sc?=?new?Scanner(System.in);
	/**
	?*?@param?args
	?*/
	public?static?void?main(String[]?args)?{
		//?TODO?Auto-generated?method?stub
		String[]?name?=?{"數據結構","大學英語","高數","網絡工程","軟件工程","毛概"};
		
		
		while(true){
			System.out.println("輸入命令：1-按照名稱查找圖書;2-按照序號查找圖書");
			String?book;
			try{
				int?input?=?print();
				switch(input){
					case?1:
						book?=?getBookByName(name);
						System.out.println("book:"+book);
						break;
					case?2:
						book?=?getBookByNum(name);
						System.out.println("book:"+book);
						break;
					case?-1:
						System.out.println("命令輸入錯誤！請根據提示輸入數字命令！");
						sc?=?new?Scanner(System.in);
						continue;
					default:
						System.out.println("命令輸入錯誤！");
						continue;
				}
				break;
			}catch(Exception?e){
				System.out.println(e.getMessage());
				continue;
			}
		}
	}
	//按照圖書名稱查找
	public?static?String?getBookByName(String[]?nameBooks)?throws?Exception{
		System.out.println("請輸入圖書名稱：");
		String?nameSearch?=?sc.next();
		
		for(int?i=0;?i<nameBooks.length;?i++){
			if(nameSearch.equals(nameBooks[i]))
				return?nameBooks[i];
		}
		throw?new?Exception("圖書不存在！");
	}
	//按照圖書序號查找
	public?static?String?getBookByNum(String[]?namebooks)?throws?Exception{
		while(true){
			System.out.println("請輸入圖書序號：");
			int?num?=?print();
			try{
				if(num?==?-1){
					System.out.println("命令輸入錯誤！請根據提示輸入數字命令！");
					continue;
				}
				String?book?=?namebooks[num-1];
				return?book;
			}catch(Exception?e){
				return?"圖書不存在";
			}
		}
	}
	//輸入命令，輸入圖書序號
	public?static?int?print(){
		int?x;
		try?{
			x?=?sc.nextInt();
			return?x;
		}?catch?(Exception?e)?{
			//?TODO:?handle?exception
			
			return?-1;
		}
	}
}