import java.util.Scanner;

public class jieShu {

static String shu[] = {"西游記","三國演義","水滸傳","紅樓夢"};

public static void main(String[] args) {

System.out.println("歡迎進入借書系統！");

jie();

}

public static void jie () {

System.out.println("請選擇找書方式：1.按序號查找，2.按名稱查找");

try {??

Scanner input = new Scanner(System.in);

int x = input.nextInt();

if (x == 1) {

num();

}else if (x == 2) {

name();

}else {

System.out.println("您輸入錯誤！");

jie();

}

}catch(Exception e) {

System.out.println("請按操作執行！");

jie();

}

}

public static void num() {

try {

System.out.print("請輸入序號：");

Scanner input = new Scanner(System.in);

int x = input.nextInt();

if (x==1 || x==2 || x==3 || x==4) {

System.out.println("您借的書為："+shu[x-1]);

System.out.println("是否繼續借書？1.是，2.否。");

int y = input.nextInt();

if (y == 1) {

jie();

}else {

System.out.println("歡迎下次光臨！");

}

}else {

System.out.println("請輸入1-4之間的整數");

}

}catch(Exception e) {

System.out.println("請輸入正確的數字！");

num();

}

}

public static void name() {

try {

System.out.print("請輸入名稱：");

Scanner input = new Scanner(System.in);

String x = input.next();

if (x.equals(shu[0]) || x.equals(shu[1]) || x.equals(shu[2]) || x.equals(shu[3])) {

System.out.println("您借的書為："+x);

System.out.println("是否繼續借書？1.是，2.否。");

int y = input.nextInt();

if (y == 1) {

jie();

}else {

System.out.println("歡迎下次光臨！");

}

}else {

System.out.println("您輸入的書名不存在，請重新輸入。");

name();

}

}catch(Exception e) {

System.out.println("請輸入正確的書名！");

name();

}

}

}