Synchronization of old projects

Part1
2025-09-30 16:46:01 +08:00
parent 116b65164b
commit 4e1548abe2
167 changed files with 8668 additions and 43 deletions
@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>
@@ -0,0 +1,68 @@
+namespace Lesson2_成员变量和访问修饰符练习
+{
+    class Person
+    {
+        public int age,height;
+        public string name,address;
+    }
+    class Student
+    {
+        public string name;
+        public int number, age;
+        public Student deskmate;
+        void Study()
+        {
+            Console.WriteLine();
+        }
+    }
+    class Cla
+    {
+        public string Major;
+        public int TeacherCapacity,StudentCapacity;
+
+    }
+    internal class Program
+    {
+        static void Main(string[] args)
+        {
+            //Console.WriteLine("Hello, World!");
+            //Person p = new Person();
+            //Person p2 = new Person();
+            //p.age = 10;
+            //p2.age = 20;
+            ////不同对象的存储空间不同，所以值不会相同
+            //Console.WriteLine(p.age);
+            //Console.WriteLine(p2.age);
+
+            Person p = new Person();
+            p.age = 10;
+            Person p2 = p;
+            p2.age = 20;
+            //p2指向了p的内存地址，共享一块地址，所以p2改了，p也会改为20
+            Console.WriteLine(p.age);
+            Console.WriteLine(p2.age);
+
+            //Student s = new Student();
+            //s.age = 10;
+            //int age = s.age;
+            //age = 20;
+            ////因为age是值类型，是一个新的空间，所以s.age不受影响
+            //Console.WriteLine(s.age);
+            //Console.WriteLine(age);
+
+            Student s = new Student();
+            s.deskmate = new Student();
+            s.deskmate.age = 10;
+            Student s2 = s.deskmate;
+            s2.age = 20;
+            //s.deskmate虽然new了空间在后面被指向了s2的地址
+            //所以s.deskmate的地址是和s2共享的  s.deskmate就是s2
+            //s2.age变了s.deskmate.age也会变
+            Console.WriteLine(s.deskmate.age);
+            Console.WriteLine(s2.age);
+
+            Cla c = new Cla();
+
+        }
+    }
+}