class And object_Three

失的猛

//利用构造函数初始化对象

来源：Visual C# 2008 How to Program,Third Edition

GradeBookTest.cs

1. using System;
   
2. 
   
3. public class GradeBookTest
   
4. {
   
5.     //Main method begins program execution
   
6. 
   
7.     public static void Main(string[] args)
   
8.     {
   
9.         GradeBook myGradeBook1 = new GradeBook("Your are the best!Nobody can beat you.");
   
10.         
    
11.         GradeBook myGradeBook2 = new GradeBook("I'm so lonely,my heart is so empty!");
    
12.         
    
13.         Console.WriteLine("Initial course name is:'{0}'\n",myGradeBook1.CourseName);
    
14.         Console.WriteLine("Initial course name is:'{0}'\n",myGradeBook2.CourseName);
    
15.     
    
16.         myGradeBook1.DisplayMessage();
    
17.         myGradeBook2.DisplayMessage();
    
18.         
    
19.         Console.ReadKey(true);
    
20.     }
    
21. }

GradeBook.cs

1. using System;
   
2. 
   
3. public class GradeBook
   
4. {
   
5.     /*auto-implemented property CourseName implicitly created an
   
6.      instance variable for this GradeBook's course name*/
   
7.     public string CourseName {get;set;}
   
8.     
   
9.     //constructor initializes auto-implemented property
   
10. 
    
11.     //CourseName with string supplied as argument
    
12. 
    
13.     public GradeBook(string name)
    
14.     {
    
15.         CourseName = name;
    
16.     }
    
17.     
    
18.     //display a welcome message to the GradeBook user
    
19. 
    
20.     public void DisplayMessage()
    
21.     {
    
22.         Console.WriteLine("Welcome to the grade book for\n{0}!",CourseName);
    
23.     }
    
24. }

Our life is fritter away with detial……Simplify,simplify!