课堂作业之借书卡

package org.java.application;


class BookCard {
	   String Cardnum,name,Idname;//包含账号,持卡人姓名
	   int borrowsnum,Returnnum,Remain;//已借书数,已还书数,可借书数
	   //本次借书数//本次还书数。
	   //方法有借书、还书和查询。
	   public void borrow(int cash){
		   if(Remain>=cash){
		   	Remain=Remain-cash;
		   	System.out.println("本次借阅书数"+cash);
			System.out.println("可借书数"+Remain);
		   }
	   }
	   public BookCard(String cardnum, String name, String idname, int borrowsnum,int returnnum, int remain) {
		Cardnum = cardnum;
		this.name = name;
		Idname = idname;
		this.borrowsnum = borrowsnum;
		Returnnum = returnnum;
		Remain = remain;
	   }
		public BookCard() {
		// TODO Auto-generated constructor stub
	}
		public void TheReturn(int cash){
			Remain=Remain+cash;
			System.out.println("本次还书数"+cash);
			System.out.println("可借书数"+Remain);
		}
		public void query(){
			System.out.println("可借书数"+Remain);
		}
}
public class Task02 {
	public static void main(String[] args) {		//程序的入口
		BookCard wang=new BookCard();	//创建类的对象
		wang.borrowsnum=10;
		wang.Cardnum="111";
		wang.Idname="12345";
		wang.name="wangwu";
		wang.Remain=5;
		wang.Returnnum=2;
		wang.borrow(2);
		wang.TheReturn(1);
		wang.query();
	}
}

课堂作业之借书卡_第1张图片

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