69 lines
1.9 KiB
C#
69 lines
1.9 KiB
C#
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namespace Lesson2_成员变量和访问修饰符练习
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{
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class Person
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{
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public int age,height;
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public string name,address;
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}
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class Student
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{
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public string name;
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public int number, age;
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public Student deskmate;
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void Study()
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{
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Console.WriteLine();
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}
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}
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class Cla
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{
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public string Major;
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public int TeacherCapacity,StudentCapacity;
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}
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internal class Program
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{
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static void Main(string[] args)
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{
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//Console.WriteLine("Hello, World!");
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//Person p = new Person();
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//Person p2 = new Person();
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//p.age = 10;
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//p2.age = 20;
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////不同对象的存储空间不同，所以值不会相同
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//Console.WriteLine(p.age);
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//Console.WriteLine(p2.age);
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Person p = new Person();
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p.age = 10;
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Person p2 = p;
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p2.age = 20;
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//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
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Console.WriteLine(p.age);
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Console.WriteLine(p2.age);
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//Student s = new Student();
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//s.age = 10;
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//int age = s.age;
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//age = 20;
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////因为age是值类型，是一个新的空间，所以s.age不受影响
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//Console.WriteLine(s.age);
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//Console.WriteLine(age);
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Student s = new Student();
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s.deskmate = new Student();
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s.deskmate.age = 10;
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Student s2 = s.deskmate;
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s2.age = 20;
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//s.deskmate虽然new了空间在后面被指向了s2的地址
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//所以s.deskmate的地址是和s2共享的 s.deskmate就是s2
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//s2.age变了s.deskmate.age也会变
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Console.WriteLine(s.deskmate.age);
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Console.WriteLine(s2.age);
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Cla c = new Cla();
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}
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}
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}
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