diff --git "a/26 \351\231\210\344\275\263\347\202\234/20221221 \344\275\263\347\202\234.md" "b/26 \351\231\210\344\275\263\347\202\234/20221221 \344\275\263\347\202\234.md"
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+++ "b/26 \351\231\210\344\275\263\347\202\234/20221221 \344\275\263\347\202\234.md"	
@@ -0,0 +1,138 @@
+# 作业
+
+```java
+import java.util.Scanner;
+
+public class five {
+    public static void main(String[] args) {
+        System.out.println("请输入园的半径");
+        Scanner sc = new Scanner(System.in);
+        int bj= sc.nextInt();
+        radius(bj);
+    }
+    public static void radius(int bj){
+        double mj = bj*bj*3.14;
+        double zc = bj*3.14*2;
+        System.out.println("园的面积为"+mj);
+        System.out.println("园的周长为"+zc);
+    }
+}
+```
+
+```java
+import java.util.Arrays;
+import java.util.Random;
+import java.util.Scanner;
+public class six {
+    public static void main(String[] args) {
+        int[] n=new int[20];
+        for (int i=0;i<n.length;i++){
+            Random rnd=new Random();
+            n[i]= rnd.nextInt(10);
+        }
+        Scanner a=new Scanner(System.in);
+        System.out.println("输入某个数");
+        int aa= a.nextInt();
+        sz(n,aa);
+    }
+    public static void sz(int[] n, int aa){
+        int b=0;
+        for (int i=0;i<20;i++){
+            if (n[i]==aa){
+                b++;
+            }
+        }
+        System.out.println(Arrays.toString(n));
+        System.out.println("出现了"+b+"次");
+    }
+}
+```
+
+```java
+import java.util.Arrays;
+import java.util.Scanner;
+public class seven {
+        public static void main(String[] args) {
+            System.out.println("输入十个元素");
+            int[] n = new int[10];
+            for (int i = 0; i < 10; i++) {
+                System.out.println("请输入元素" + (i + 1));
+                Scanner a = new Scanner(System.in);
+                n[i] = a.nextInt();
+            }
+            int[] arr = sz(n);
+            System.out.println(Arrays.toString(arr));
+        }
+
+        public static int[] sz(int[] n) {
+            int max = n[0];
+            int min = n[0];
+            int a = 0;
+            int b = 0;
+            for (int i = 0; i < 10; i++) {
+                if (n[i] > max) {
+                    max = n[i];
+                    a = i;
+                }
+            }
+            int t = n[a];
+            n[a] = n[0];
+            n[0] = t;
+            for (int j = 0; j < 10; j++) {
+                if (n[j] < min) {
+                    min = n[j];
+                    b = j;
+                }
+            }
+            int tt = n[b];
+            n[b] = n[9];
+            n[9] = tt;
+            return n;
+        }
+    }
+```
+
+```java
+import java.util.Scanner;
+public class eight {
+    public static void main(String[] args) {
+        System.out.println("输入数组元素个数");
+        Scanner n=new Scanner(System.in);
+        int[] a=new int[n.nextInt()];
+        System.out.println("请输入"+a.length+"个元素");
+        for (int i=0;i<a.length;i++){
+            Scanner n1=new Scanner(System.in);
+            a[i]= n1.nextInt();
+        }
+        int js=sz(a);
+        System.out.println("数组中元素和为"+js);
+    }
+    public static int sz(int[] a){
+        int b=0;
+        for (int i=0;i<a.length;i++){
+            b+=a[i];
+        }
+        return b;
+    }
+}
+```
+
+```java
+import java.util.Scanner;
+public class nine {
+    public static void main(String[] args) {
+        System.out.println("请输入整数");
+        Scanner n=new Scanner(System.in);
+        int a= n.nextInt();
+        double jg=jc(a);
+        System.out.println(a+"的阶乘为"+jg);
+    }
+    public static double jc(int  a){
+        int aa=1;
+        for (int i=1;i<=a;i++){
+            aa=aa*i;
+        }
+        return aa;
+    }
+}
+```
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