Static class variable : Class Variables : Class Interface C# Source Code

    

/*
Learning C# 
by Jesse Liberty

Publisher: O'Reilly 
ISBN: 0596003765
*/
 using System;

 namespace Test_Console_App_3
 {

     // declare a Cat class
     // stripped down
     class Cat
     {
         // a private static member to keep
         // track of how many Cat objects have
         // been created
         private static int instances = 0;
         private int weight;
         private String name;

         // cat constructor
         // increments the count of Cats
         public Cat(String name, int weight)
         {
             instances++;
             this.name = name;
             this.weight = weight;
         }

         // Static method to retrieve
         // the current number of Cats
         public static void HowManyCats()
         {
             Console.WriteLine("{0} cats adopted",
                 instances);
         }
         public void TellWeight()
         {
             Console.WriteLine("{0} is {1} pounds",
                 name, weight);
         }
     }

    public class StaticInClassTester
    {
       public void Run()
       {
           Cat.HowManyCats();
           Cat frisky = new Cat("Frisky", 5);
           frisky.TellWeight();
           Cat.HowManyCats();
           Cat whiskers = new Cat("Whisky", 7);
           whiskers.TellWeight();
           Cat.HowManyCats();
       }

       static void Main()
       {
          StaticInClassTester t = new StaticInClassTester();
          t.Run();
       }
    }
 }