From 75d3e69bc802476a1d3e8c80af77024889c7f5f3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=98=99=E8=8B=8F=E6=96=87?= <2361635242@qq.com>
Date: Sun, 25 Dec 2022 12:51:04 +0800
Subject: [PATCH] =?UTF-8?q?=E5=A4=A7=E4=BD=9C=E4=B8=9A?=
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---
 ...40\345\244\247\344\275\234\344\270\232.md" | 182 ++++++++++++++++++
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 create mode 100644 "16 \351\230\231\350\213\217\346\226\207/20221225 java\346\226\271\346\263\225\345\244\215\344\271\240\345\244\247\344\275\234\344\270\232.md"

diff --git "a/16 \351\230\231\350\213\217\346\226\207/20221225 java\346\226\271\346\263\225\345\244\215\344\271\240\345\244\247\344\275\234\344\270\232.md" "b/16 \351\230\231\350\213\217\346\226\207/20221225 java\346\226\271\346\263\225\345\244\215\344\271\240\345\244\247\344\275\234\344\270\232.md"
new file mode 100644
index 0000000..5292c37
--- /dev/null
+++ "b/16 \351\230\231\350\213\217\346\226\207/20221225 java\346\226\271\346\263\225\345\244\215\344\271\240\345\244\247\344\275\234\344\270\232.md"	
@@ -0,0 +1,182 @@
+# 作业
+
+
+
+```java
+import java.util.Scanner;
+
+public class D1 {
+
+    //放外面，让大家共享
+    static String[] book =new String[10];
+    static Scanner cs=new Scanner(System.in);
+    public static void main(String[] args) {
+
+        book[0]="《钢铁是怎样炼成的》";
+        book[1]="《Offer来了》";
+        book[2]="《java从入门到精通》";
+        book[3]="《java入门》";
+        book[4]="《Java基础》";
+        while (true){
+            start();
+            int aa =top(choice(),book);
+            if (aa>0) {
+                break;
+            }
+        }
+
+
+    }
+    //启动系统，菜单
+    public static void start(){
+        System.out.println("==============================\n" +
+                "-     欢迎使用2班书本管理系统   -\n" +
+                "- \t\t1.浏览所有书本信息\t\t- \n" +
+                "- \t\t2.添加书本信息\t\t- \n" +
+                "- \t\t3.修改书本信息\t\t- \n" +
+                "- \t\t4.删除书本信息\t\t- \n" +
+                "- \t\t5.查询书本信息\t\t- \n" +
+                "- \t\t6.退出书本系统\t\t- \n" +
+                "==============================");
+    }
+
+    //选择菜单的功能
+    public static int choice(){
+        System.out.println("请选择你的操作：");
+        Scanner cs=new Scanner(System.in);
+        int num = cs.nextInt();
+        return num;
+    }
+
+    //根据选择的数字，使用不同的功能
+    public static int top(int num,String[] browse){
+        int aa=0;
+        switch (num){
+            case 1:
+                //System.out.println("1.浏览所以书本信息");
+                yillsysbxx(browse);
+                break;
+            case 2:
+                //System.out.println("2.添加书本信息");
+                tjsbxx(browse);
+                break;
+            case 3:
+                //System.out.println("3.修改书本信息");
+                xgsbxx(browse);
+                break;
+            case 4:
+                //System.out.println("4.删除书本信息");
+                scsbxx(browse);
+                break;
+            case 5:
+                //System.out.println("5.查询书本信息");
+                cxsbxx(browse);
+                break;
+            case 6:
+                //System.out.println("6.退出书本系统");
+
+                System.out.println("你选择退出书本系统，再见！");
+                aa =1;
+                break;
+        }
+        return aa;
+    }
+
+    //功能5
+    private static void cxsbxx(String[] browse) {
+        System.out.println("请输入你要查询的书本信息");
+        String naem = cs.next();
+        int index =searchArr(browse,naem);
+        if (index==-1){
+            System.out.println("查无此书");
+        }else{
+            System.out.println("此书在第"+(index+1)+"个！");
+        }
+    }
+
+    //功能4
+    private static void scsbxx(String[] browse) {
+        System.out.println("请请输入你要删除的书本信息:");
+        String name= cs.next();
+        int index =searchArr(browse,name);
+        if (index==-1){
+            System.out.println("无法删除，没有这个书");
+        }else{
+            browse[index]=null;
+            System.out.println("删除成功！");
+
+        }
+    }
+
+
+    //功能3
+    private static void xgsbxx(String[] browse) {
+        System.out.println("请输入你要修改的书本名称");
+        String name = cs.next();
+        int index = searchArr(browse,name);
+        System.out.println(index);
+        if (index==-1){
+            System.out.println("对不起没有找到这本书！");
+        }else {
+            System.out.println("请输入新的书名:");
+            String newName = cs.next();
+            browse[index]=newName;
+            System.out.println("修改成功！");
+        }
+    }
+
+    //功能2
+    public static void tjsbxx(String[] browse) {
+        System.out.println("请输入你要添加的书本名称");
+        String name= cs.next();
+        int a=searchArr(browse,name);
+        if (a==-1){
+            int index =searchArr(browse,null);
+            browse[index]=name;
+            System.out.println("添加成功！");
+        }else {
+            System.out.println("已经存在"+name+"请不要重新添加！");
+        }
+
+    }
+
+
+    //功能1
+    private static void yillsysbxx(String[] browse) {
+        int counnt =0;
+        System.out.println("现在有以下书本：");
+            for (String name:browse){
+                counnt++;
+                if (name==null){
+                    continue;
+                }
+                System.out.println(name+"\t");
+            }
+        System.out.println();
+    }
+
+    //方法
+    public static int searchArr(String[] browse, String name){
+        int index = -1;
+        if (name==null){
+            for (int i = 0; i < browse.length; i++) {
+                if (browse[i]==null){
+                    index=i;
+                    break;
+                }
+            }
+        }else {
+            for (int i=0;i<browse.length;i++){
+                if (name.equals(browse[i])){
+                    index=i;
+                    break;
+                }
+            }
+        }
+        return index;
+    }
+}
+```
+
+
+
-- 
Gitee