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// Convert a Rectangle to a Square!



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[book] [en] Pro C# 2008 and the NET 3.5 Platform Fourth Edition

// Convert a Rectangle to a Square!

Rectangle rect;

rect.Width = 3;

rect.Height = 10;

Square sq = (Square)rect; 

Creating Custom Conversion Routines

Begin by creating a new Console Application named CustomConversions. C# provides two key-

words, explicit and implicit, that you can use to control how your types respond during an

attempted conversion. Assume you have the following structure definitions:

public struct Rectangle

{

// Public for ease of use;



// however, feel free to encapsulate with properties.

public int Width, Height;

public Rectangle(int w, int h)

{

Width = w; Height = h;



}

public void Draw()

{

for (int i = 0; i < Height; i++)



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{

for (int j = 0; j < Width; j++)

{

Console.Write("*");



}

Console.WriteLine();

}

}

public override string ToString()



{

return string.Format("[Width = {0}; Height = {1}]",

Width, Height);

}

}



public struct Square

{

public int Length;



public Square(int l)

{

Length = l;



}

public void Draw()

{

for (int i = 0; i < Length; i++)



{

for (int j = 0; j < Length; j++)

{

Console.Write("*");



}

Console.WriteLine();

}

}

public override string ToString()



{ return string.Format("[Length = {0}]", Length); }


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