黑马程序员_面向对象的三个基本特征

  1 using System;
  2 using System.Collections.Generic;
  3 using System.Linq;
  4 using System.Text;
  5 
  6 namespace ConsoleApplication3
  7 {
  8     #region 人类，父类。
  9     class Person
 10     {
 11         private string name;
 12 
 13         protected string Name
 14         {
 15             get { return name; }
 16             set { name = value; }
 17         }
 18 
 19         private char sex;
 20 
 21         protected char Sex
 22         {
 23             get { return sex; }
 24             set { sex = value; }
 25         }
 26 
 27         private int age;
 28 
 29         protected int Age
 30         {
 31             get { return age; }
 32             set { age = value; }
 33         }
 34 
 35         public Person(string name, char sex, int age)
 36         {
 37             this.Name = name;
 38             this.Sex = sex;
 39             this.Age = age;
 40         }
 41     } 
 42     #endregion
 43 
 44     #region 老师类，继承（派生）于人类，子类。
 45     class Teacher : Person
 46     {
 47         private int year;
 48 
 49         public int Year
 50         {
 51             get { return year; }
 52             set { year = value; }
 53         }
 54 
 55         private int salary;
 56 
 57         public int Salary
 58         {
 59             get { return salary; }
 60             set { salary = value; }
 61         }
 62 
 63         public Teacher(string name, char sex, int age, int year, int salary)
 64             : base(name, sex, age)
 65         {
 66             this.Year = year;
 67             this.Salary = salary;
 68         }
 69 
 70         public void SayHello()
 71         {
 72             Console.WriteLine("我是{0}，当了{1}年老师，我的月薪是{2}。", Name, Year, Salary);
 73         }
 74     } 
 75     #endregion
 76 
 77     #region 学生类，继承（派生）于人类，子类。
 78     class Student : Person
 79     {
 80         private string hobby;
 81 
 82         protected string Hobby
 83         {
 84             get { return hobby; }
 85             set { hobby = value; }
 86         }
 87 
 88         private int classID;
 89 
 90         protected int ClassID
 91         {
 92             get { return classID; }
 93             set { classID = value; }
 94         }
 95 
 96         public Student(string name, char sex, int age, string hobby, int classID)
 97             : base(name, sex, age)
 98         {
 99             this.Hobby = hobby;
100             this.ClassID = classID;
101         }
102 
103         public void SayHello()
104         {
105             Console.WriteLine("我是{0}，我是{1}孩，今年{2}岁，爱好是{3}，在{4}班。", Name, Sex, Age, Hobby, ClassID);
106         }
107     } 
108     #endregion
109 
110     class Program
111     {
112         static void Main(string[] args)
113         {
114             Student s = new Student("张三", ‘男‘, 18, "踢足球", 3);
115             s.SayHello();
116             Teacher t = new Teacher("王老师", ‘女‘, 30, 5, 8000);
117             t.SayHello();
118             Console.ReadKey(true);
119         }
120     }
121 }