C# 0 The Complete Reference

PART I

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PART IPART I

  public double Height {

     get { return pri_height; }

     set { pri_height = value < 0 ? -value : value; }

  }

  public void ShowDim() {

    Console.WriteLine("Width and height are " +

                       Width + " and " + Height);

  }

}

// A derived class of TwoDShape for triangles.

class Triangle : TwoDShape {

  string Style;

  /* A default constructor. This automatically invokes

     the default constructor of TwoDShape. */

  public Triangle() {

    Style = "null";

  }

  // Constructor that takes three arguments.

  public Triangle(string s, double w, double h) : base(w, h) {

    Style = s;

  }

  // Construct an isosceles triangle.

  public Triangle(double x) : base(x) {

    Style = "isosceles";

  }

  // Return area of triangle.

  public double Area() {

    return Width * Height / 2;

  }

  // Display a triangle's style.

  public void ShowStyle() {

    Console.WriteLine("Triangle is " + Style);

  }

}

class Shapes5 {

  static void Main() {

    Triangle t1 = new Triangle();

    Triangle t2 = new Triangle("right", 8.0, 12.0);

    Triangle t3 = new Triangle(4.0);

    t1 = t2;

    Console.WriteLine("Info for t1: ");

    t1.ShowStyle();

    t1.ShowDim();

    Console.WriteLine("Area is " + t1.Area());

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    Console.WriteLine();

    Console.WriteLine("Info for t2: ");

    t2.ShowStyle();

    t2.ShowDim();

    Console.WriteLine("Area is " + t2.Area());

    Console.WriteLine();

    Console.WriteLine("Info for t3: ");

    t3.ShowStyle();

    t3.ShowDim();

    Console.WriteLine("Area is " + t3.Area());

    Console.WriteLine();

  }

}

Here is the output from this version:

Info for t1:

Triangle is right

Width and height are 8 and 12

Area is 48

Info for t2:

Triangle is right

Width and height are 8 and 12

Area is 48

Info for t3:

Triangle is isosceles

Width and height are 4 and 4

Area is 8

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