ch2_02.cs

《c#技术内幕代码》

using System;

class Transportation
{
    private int fNumWheels;
    private int fDoors;
    private float fMaxSpeed;

    public Transportation()
    {
       // Default values
       fNumWheels = 4;
       fDoors     = 2;
       fMaxSpeed  = (float)55.0; // MPH
    }    
    
    public int getNumberOfWheels()
    {
       return fNumWheels;
    }
    public void setNumberofWheels(int nw)
    {
       fNumWheels = nw;
    }
    public int getNumberOfDoors()
    {
       return fDoors;
    }
    public void setNumberOfDoors(int nd)
    {
       fDoors = nd;
    }
    public float getMaxSpeed()
    {
       return fMaxSpeed;
    }
    public void setMaxSpeed(float ms)
    {
       fMaxSpeed = ms;
    }
}

class Bicycle : Transportation
{
    public Bicycle()
    {
       setNumberofWheels(2);
       setNumberOfDoors(0);
       setMaxSpeed((float)15.5);
    }
}

class Automobile : Transportation
{
    public Automobile()
    {
       setNumberofWheels(4);
       setNumberOfDoors(4);
       setMaxSpeed((float)65.5);
    }
       
}

class CH2_2
{
   public static void Main()
   {
      Transportation t1 = new Transportation();
      Transportation t2 = new Bicycle();
      Transportation t3 = new Automobile();
      
      Console.WriteLine("T1: # Wheels = {0}, # Doors = {1}, Max Speed = {2}", 
            t1.getNumberOfWheels(), t1.getNumberOfDoors(), t1.getMaxSpeed());
      Console.WriteLine("T2: # Wheels = {0}, # Doors = {1}, Max Speed = {2}", 
            t2.getNumberOfWheels(), t2.getNumberOfDoors(), t2.getMaxSpeed());
      Console.WriteLine("T3: # Wheels = {0}, # Doors = {1}, Max Speed = {2}", 
            t3.getNumberOfWheels(), t3.getNumberOfDoors(), t3.getMaxSpeed());
      
	
      
   }
}