diff --git "a/02 \351\231\210\346\230\216\345\207\275/\347\254\254n\346\254\241\344\275\234\344\270\232.md" "b/02 \351\231\210\346\230\216\345\207\275/\347\254\254n\346\254\241\344\275\234\344\270\232.md"
new file mode 100644
index 0000000000000000000000000000000000000000..33c965e98d70205e087d1e5d27022c9d14b53d17
--- /dev/null
+++ "b/02 \351\231\210\346\230\216\345\207\275/\347\254\254n\346\254\241\344\275\234\344\270\232.md"	
@@ -0,0 +1,98 @@
+# 第n次作业
+
+```java
+import java.util.Scanner;
+
+public class MK {
+    public static void main(String[] args) {
+    String[]books=new String[10];
+    books[0]="二战全史";
+    books[1]="海权论";
+    books[2]="毛泽东选集";
+    while(true) {
+        start();
+        int num = choice();
+        if (num==6){
+            break;
+        }
+        todo(num, books);
+    }
+
+    }
+    public static void start(){
+        System.out.println(""+"==============================\n" +
+                "-     欢迎使用书本管理系统   -\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.退出管理系统\t\t-\n" +
+                "==============================");
+    }
+    public static int choice(){
+        System.out.println("请选择您的操作：");
+        Scanner sc =new Scanner(System.in);
+        int num = sc.nextInt();
+        return num;
+    }
+    public static void todo(int num,String[] books){
+        switch (num){
+            case 1:
+               // System.out.println("1.浏览所有书本信息");
+                viewAllBooks(books);
+                break;
+            case 2:
+                //System.out.println("2.添加书本信息");
+                addBooks(books);
+                break;
+            case 3:
+                //System.out.println("3.修改书本信息");
+                editBooks(books);
+                break;
+            case 4:
+                //System.out.println("4.删除书本信息");
+                deleteBooks(books);
+                break;
+            case 5:
+                //System.out.println("5.查询书本信息");
+                searchBooks(books);
+                break;
+            case 6:
+                //System.out.println("6.退出管理系统");
+                break;
+            default:
+                System.out.println("输入错误，没有该功能");
+                break;
+
+
+        }
+
+    }
+
+    private static void searchBooks(String[] books) {
+        System.out.println("请输入你要查询的书本");
+        Scanner sc =new Scanner(System.in);
+        String name = sc.next();
+        int index=searchArr(books,name);
+        if (index==-1){
+            System.out.println("查无此书");
+        }else {
+            books[index]=null;
+            System.out.println("删除成功");
+        }
+    }
+
+    private static void deleteBooks(String[] books) {
+        System.out.println("请输入你要删除的书本");
+        Scanner sc =new Scanner(System.in);
+        String name = sc.next();
+        int index=searchArr(books,name);
+        if (index==-1){
+            System.out.println("查无此书");
+        }else {
+            System.out.println("查询成功,位于"+(index+1));
+        }
+    }
+```
+