Demonstrate a namespace

   

/*
C#: The Complete Reference 
by Herbert Schildt 

Publisher: Osborne/McGraw-Hill (March 8, 2002)
ISBN: 0072134852
*/

using System;
// Demonstrate a namespace. 
// Declare a namespace for counters. 
namespace Counter { 
  // A simple countdown counter. 
  class CountDown { 
    int val; 
 
    public CountDown(int n) { val = n; } 
 
    public void reset(int n) { 
      val = n; 
    } 
 
    public int count() { 
      if(val > 0) return val--; 
      else return 0; 
    } 
  } 
} 
 
public class NSDemo1 { 
  public static void Main() { 
    Counter.CountDown cd1 = new Counter.CountDown(10); 
    int i; 
 
    do { 
      i = cd1.count(); 
      Console.Write(i + " "); 
    } while(i > 0); 
    Console.WriteLine(); 
 
    Counter.CountDown cd2 = new Counter.CountDown(20); 
 
    do { 
      i = cd2.count(); 
      Console.Write(i + " "); 
    } while(i > 0); 
    Console.WriteLine(); 
 
    cd2.reset(4); 
    do { 
      i = cd2.count(); 
      Console.Write(i + " "); 
    } while(i > 0); 
    Console.WriteLine(); 
  } 
}