diff --git "a/\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\344\270\207\347\250\213\347\245\245/Program.cs" "b/\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\344\270\207\347\250\213\347\245\245/Program.cs"
new file mode 100644
index 0000000000000000000000000000000000000000..e81d6f60c4297729d791cd036cc1de4a1985a71e
--- /dev/null
+++ "b/\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\344\270\207\347\250\213\347\245\245/Program.cs"
@@ -0,0 +1,202 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Work05._12;
+
+namespace ConsoleApp1
+{
+    class Program
+    {
+        
+
+       
+        static void Main(string[] args)
+        {
+
+            Information student = new Information();
+
+            student.userName = "adamin";
+            student.Password = "admin";
+            student.PasswordAttributes = "英文字母";
+
+            student.call();
+        }
+        
+    
+
+
+        static void Square()
+        {
+            //用户输入正方形边长，用*打印出实心正方形。
+            Console.WriteLine("请输入正方形的边长数：");
+            int a = int.Parse(Console.ReadLine());
+            string[,] arr = new string[a, a];
+            for (int i = 0; i < a; i++)
+            {
+                for (int j = 0; j < a; j++)
+                {
+                    arr[i, j] = "*";
+                }
+            }
+            for (int i = 0; i < a; i++)
+            {
+                Console.WriteLine();
+                for (int j = 0; j < a; j++)
+                {
+                    Console.Write(arr[i, j]);
+
+                }
+            }
+
+        }
+
+        //九九乘法表
+        static void nine()
+        {
+            string[,] arr = new string[9, 9];
+            for (int i = 0; i < arr.GetLength(0); i++)
+            {
+                for (int j = 0; j <= i; j++)
+                {
+                    arr[i, j] = (i + 1) + "*" + (j + 1) + "=" + (i + 1) * (i + 1) + "\t";
+                }
+            }
+
+            for (int i = 0; i < arr.GetLength(0); i++)
+            {
+                Console.WriteLine();
+                for (int j = 0; j < arr.GetLength(1); j++)
+                {
+                    Console.Write(arr[i, j]);
+
+                }
+            }
+
+        }
+        //static void nine2()
+        //{
+        //    int[][] arr2= new int[9][]; 
+        //    for (int i = 0; i < arr2.GetLength(0); i++)
+        //    {
+        //        for (int j = 0; j <= i; j++)
+        //        {
+        //            arr2[i, j] = (i + 1) + "*" + (j + 1) + "=" + (i + 1) * (i + 1) + "\t";
+        //        }
+        //    }
+
+        //    for (int i = 0; i < arr2.GetLength(0); i++)
+        //    {
+        //        Console.WriteLine();
+        //        for (int j = 0; j < arr2.GetLength(1); j++)
+        //        {
+        //            Console.Write(arr2[i, j]);
+
+        //        }
+        //    }
+
+        //}
+
+        static void HollowSqune()
+        {
+            //用户输入正方形边长，用*打印出空心正方形。
+            Console.WriteLine("请输入空心正方形的边长数：");
+            int a = int.Parse(Console.ReadLine());
+            string[,] arr = new string[a, a];
+            for (int i = 0; i < arr.GetLength(0); i++)
+            {
+                for (int j = 0; j < arr.GetLength(1); j++)
+                {
+                    if (i == 0 | i == arr.GetLength(0) - 1)
+                    {
+                        arr[i, j] = "*";
+                    }
+                    else
+                    {
+                        if (j == 0 || j == arr.GetLength(1) - 1)
+                        {
+                            arr[i, j] = "*";
+                        }
+                        else
+                        {
+                            arr[i, j] = " ";
+                        }
+                    }
+                    Console.Write(arr[i, j]);
+
+                }
+                Console.WriteLine( );
+            }
+        }
+
+
+
+        //菱形
+        static void rhombus()
+        {
+            Console.WriteLine("请输入菱形的边长数：");
+            int a = int.Parse(Console.ReadLine());
+            string[,] arr = new string[a, a];
+            for (int i = 0; i < a; i++)
+            {
+                for (int j = 0; j < a; j++)
+                {
+                    arr[i, j] = "*";
+                }
+            }
+        }
+
+        //在 Main 方法中创建一个字符串类型的数组，并存入 5 个值，然后将数组中下标是偶数的元素输出。
+        static void index()
+        {
+            int[] arr = { 1, 50, 3, 45, 5 };
+            int[] a = new int[5];
+            for (int i = 0; i < arr.GetLength(0); i++)
+            {
+                if (arr[i] % 2 == 0)
+                {
+                    a[i] = arr[i];
+                    Console.WriteLine(a[i]);
+                }
+            }
+        }
+
+        //如果一个数组保存元素是有序的（从大到小），
+        //向这个数组中插入一个数，使得插入后的数组元素仍然保持有序。
+        static void sort()
+        {
+            int[] arr = { 100, 80, 54, 50, 8 };
+            int[] arr1 = new int[arr.Length + 1];
+            Console.WriteLine("原数组：100, 80, 54, 50, 8");
+
+            for (int i = 0; i < 5; i++)
+            {
+                arr1[i] = arr[i];
+            }
+            Console.WriteLine("这个数组中插入一个数");
+            arr1[arr1.Length - 1] = int.Parse(Console.ReadLine());
+
+
+            for (int i = 0; i < arr1.GetLength(0); i++)
+            {
+                for (int j = 0; j < arr1.GetLength(0) - 1; j++)
+                {
+                    if (arr1[j] < arr1[j + 1])
+                    {
+                        int b = arr1[j];
+                        arr1[j] = arr1[j + 1];
+                        arr1[j + 1] = b;
+                    }
+                }
+            }
+            Console.Write("新数组：");
+            foreach (var item in arr1)
+            {
+
+                Console.Write(item + " ");
+            }
+        }
+    }
+}
+
diff --git "a/\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\344\270\207\347\250\213\347\245\245/information.cs" "b/\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\344\270\207\347\250\213\347\245\245/information.cs"
new file mode 100644
index 0000000000000000000000000000000000000000..aabc214c8dcb0f8bb6bf8e36797764a6fde24d8a
--- /dev/null
+++ "b/\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\344\270\207\347\250\213\347\245\245/information.cs"
@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Work05._12
+{
+    class Information
+    {
+        //定义一个用户类，存放用户的账号、用户名和密码属性；
+   
+        public string userName { get; set; }
+        public string Password { get; set; }
+        public string PasswordAttributes { get; set; }
+
+        public void call()
+        {
+            Console.WriteLine("我的账号是{0}，我的密码是{1},我的密码属性是{2}", this.userName, this.Password, this.PasswordAttributes);
+        }
+    }
+}
diff --git "a/\347\254\254\344\272\214\346\254\241\344\275\234\344\270\232/Program.cs" "b/\347\254\254\344\272\214\346\254\241\344\275\234\344\270\232/Program.cs"
new file mode 100644
index 0000000000000000000000000000000000000000..8e76ff26a73af8229373b4e5758c90944bda62a7
--- /dev/null
+++ "b/\347\254\254\344\272\214\346\254\241\344\275\234\344\270\232/Program.cs"
@@ -0,0 +1,164 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Demo
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            Test6();
+
+        }
+
+        //要求用户输入半径的值，打印出以此值为半径的圆的面积
+        //求圆的面积的公式：πr²。
+        //π取3.14。
+        //r由用户输入并存入一个变量中，此变量用double比较合适，因为用户可能会输入小数。
+        static void Test()
+        {
+            Console.WriteLine("请输入圆的半径：");
+            double r = double.Parse(Console.ReadLine());
+
+            double pai = 3.14;
+
+            double result = pai * r * r;
+            Console.WriteLine("圆的面积是："+result);
+        }
+
+        static void Test1()
+        {
+            int[] arr = new int[5];
+            int[] arr1 = { 1,2,2};
+            arr[0] = 123;
+            arr[1] = 123;
+            arr[2] = 123;
+
+            int key = 0;
+            switch (key)
+            {
+                case 1:
+                    Console.WriteLine();
+                    break;
+
+                case 2:
+
+                case 3:
+
+                default:
+                    break;
+            }
+
+        }
+
+        //规范的多维数组
+        public static void Test3()
+        {
+            int[,] arr2 = new int[5, 3];//5个一位数组，每个一维数组长度是3
+            
+            arr2[0, 0] = 1;
+            arr2[0, 1] = 1234;
+            arr2[0, 2] = 546;
+            arr2[1, 0] = 967;
+            arr2[1, 1] = 64;
+            arr2[1, 2] = 87;
+            arr2[2, 0] = 967;
+            arr2[2, 1] = 64;
+            arr2[2, 2] = 87;
+
+
+            int[,] arr3 = { { 1, 2 }, { 1, 2 }, { 1, 2 } };
+            for (int i = 0; i < arr2.GetLength(0); i++)
+            {
+                for (int j = 0; j < arr2.GetLength(1); j++)
+                {
+                    Console.Write(arr2[i, j] + " ");
+                }
+                Console.WriteLine();
+            }
+
+        }
+
+        //不规则的数组
+        public static void Test4()
+        {
+            int[][] arr = new int[3][];
+
+            arr[0] = new int[] { 1 };
+            arr[1] = new int[] { 1,2 };
+            arr[2] = new int[] { 1,2,3 };
+
+            for (int i = 0; i < arr.Length; i++)
+            {
+                for (int j = 0; j < arr[i].Length; j++)
+                {
+                    Console.WriteLine(arr[i][j]);
+                }
+            }
+        }
+
+        public static void Test5()
+        {
+            int[] arr = {10,50,5,55,90 };
+
+            Console.WriteLine("排序前：");
+            for (int i = 0; i < arr.Length; i++)
+            {
+                Console.Write(arr[i] + " ");
+            }
+            Console.WriteLine();
+
+            Array.Sort(arr);
+
+            Console.WriteLine("排序后：");
+            for (int i = 0; i < arr.Length; i++)
+            {
+                Console.Write(arr[i] + " ");
+            }
+        }
+
+        public static void Test6()
+        {
+            int[] arr = { 10, 50, 5, 55, 90 };
+
+            Console.WriteLine("排序前：");
+            for (int i = 0; i < arr.Length; i++)
+            {
+                Console.Write(arr[i] + " ");
+            }
+            Console.WriteLine();
+
+            Array.Sort(arr);
+
+            Console.WriteLine("排序后：");
+            for (int i = 0; i < arr.Length; i++)
+            {
+                Console.Write(arr[i] + " ");
+            }
+            Console.WriteLine();
+
+
+            Console.WriteLine("反转后：");
+            Array.Reverse(arr);
+
+            foreach (var item in arr)
+            {
+                Console.Write(item + "|");
+            }
+            
+            string str = "asdf4654sfgaf";
+            foreach (var item in str)
+            {
+                Console.Write(item+" - ");
+            }
+
+            //for (int i = 0; i < arr.Length; i++)
+            //{
+            //    Console.Write(arr[i] + " ");
+            //}
+        }
+    }
+}
diff --git "a/\347\254\254\344\272\214\346\254\241\344\275\234\344\270\232/\344\270\207\347\250\213\347\245\245/Program.cs" "b/\347\254\254\344\272\214\346\254\241\344\275\234\344\270\232/\344\270\207\347\250\213\347\245\245/Program.cs"
new file mode 100644
index 0000000000000000000000000000000000000000..e5963c047acf862f21f8b81b0e229ad56ba4cd7c
--- /dev/null
+++ "b/\347\254\254\344\272\214\346\254\241\344\275\234\344\270\232/\344\270\207\347\250\213\347\245\245/Program.cs"
@@ -0,0 +1,142 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ConsoleApp1
+{
+    class Program
+    {
+        //用户输入三个数，找出最大的数，打印输出。
+        static void Main(string[] args)
+        {
+            word1();
+            word2();
+            word3();
+            word4();
+            word5();
+        }
+        static void word1()
+        {
+            //输入一行字符串，分别统计出其中英文字母、数字、空格的个数。
+            Console.WriteLine("请输入一行字符串：");
+            string arr = Console.ReadLine();
+            int word = 0;
+            int num = 0;
+            int whritespace = 0;
+            foreach (char item in arr)
+            {
+                if (char.IsLetter(item))
+                {
+                    word++;
+                }
+                else if (char.IsDigit(item))
+                {
+                    num++;
+                }
+                else if (char.IsWhiteSpace(item))
+                {
+                    whritespace++;
+                }
+            }
+            Console.WriteLine("输入的一行字符串中有英文字母{0}个、数字{1}个、空格{2}个", word, num, whritespace);
+        }
+        static void word2()
+        {
+            //用户输入三个数，找出最大的数，打印输出。
+            Console.WriteLine("请输入第一个数：");
+            int num1 = int.Parse(Console.ReadLine());
+            Console.WriteLine("请输入第二个数：");
+            int num2 = int.Parse(Console.ReadLine());
+            Console.WriteLine("请输入第三个数：");
+            int num3 = int.Parse(Console.ReadLine());
+            int max;
+
+            if (num1 > num2)
+            {
+                if (num1 > num3)
+                {
+                    max = num1;
+                }
+                else
+                {
+                    max = num3;
+                }
+            }
+            else
+            {
+                if (num2 > num3)
+                {
+                    max = num2;
+                }
+                else
+                {
+                    max = num3;
+                }
+            }
+            Console.WriteLine("最大的数为" + max);
+
+        }
+        static void word3()
+        {
+            /*
+             编写一个程序，请用户输入一个四位整数，将用户输入的四位数的千位、百位、十位和个位分别显示出来，
+                如5632，则显示“用户输入的千位为5，百位为6，十位为3，个位为2”
+             */
+            Console.WriteLine("请输入一个四位整数：");
+            int num = int.Parse(Console.ReadLine());
+            int qianwei = (num / 1000) % 10;
+            int baiwei = (num / 100) % 10;
+            int shiwei = (num / 10) % 10;
+            int gewei = (num / 1) % 10;
+            Console.WriteLine("用户输入的千位为" + qianwei + " ," + "百位为" + baiwei + " ," + "十位为" + shiwei + " , " + "各位" + gewei);
+        }
+        static void word4()
+        {
+            /*
+             在 Main 方法中创建一个 double 类型的数组，并在该数组中存入 5 名学生的考试成绩，计算总成绩和平均成绩。
+              要求使用foreach语句实现该功能，
+             */
+            double[] arr = new double[5];
+            for (int i = 0; i < arr.Length; i++)
+            {
+                Console.WriteLine("请输入第" + (i + 1) + "名同学的考试成绩");
+                arr[i] = double.Parse(Console.ReadLine());
+            }
+            double sum = 0;
+            double avg = 0;
+            foreach (var item in arr)
+            {
+                sum = sum + item;
+                avg = sum / 5;
+            }
+            Console.WriteLine("总成绩为：" + sum);
+            Console.WriteLine("平均成绩为：" + avg);
+        }
+
+        static void word5()
+        {
+            //定义一个方法，实现一维数组的排序功能，从大到小排序。
+            int[] arr = new int[5];
+            for (int i = 0; i < arr.Length; i++)
+            {
+                Console.WriteLine("请输入第" + (i + 1) + "个数");
+                arr[i] = int.Parse(Console.ReadLine());
+                return5(arr);
+            }
+            Console.Write("从大到小排序为");
+            foreach (var item in arr)
+            {
+                Console.Write(item+" ");
+            }
+
+        }
+        static void return5(int[] arr)
+            {
+            Array.Sort(arr);
+            Array.Reverse(arr);
+            
+            }
+    }
+}