print barcode with vb.net // implicit // explicit in C#

Creating Code 128 Code Set B in C# // implicit // explicit

// implicit // explicit
USS Code 128 Printer In C#.NET
Using Barcode printer for .NET Control to generate, create Code128 image in .NET applications.
www.OnBarcode.com
Code 128C Recognizer In C#
Using Barcode recognizer for VS .NET Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
It would certainly be useful to convert your Fraction objects to intrinsic types (such as int) and back. Given an int, you can support an implicit conversion to a fraction because any whole value is equal to that value over 1 (15 == 15/1). Given a fraction, you might want to provide an explicit conversion back to an integer, understanding that some information might be lost. Thus, you might convert 9/4 to the integer value 2 (truncating to the nearest whole number).
Draw EAN 13 In Visual C#.NET
Using Barcode generation for Visual Studio .NET Control to generate, create EAN-13 Supplement 5 image in VS .NET applications.
www.OnBarcode.com
Painting Linear In C#
Using Barcode generator for Visual Studio .NET Control to generate, create Linear Barcode image in Visual Studio .NET applications.
www.OnBarcode.com
A more sophisticated Fraction class might not truncate, but rather round to the nearest whole number. Again, we re trying to keep this example simple, but feel free to implement a more sophisticated method.
Barcode Generator In Visual C#
Using Barcode generation for .NET Control to generate, create Barcode image in .NET applications.
www.OnBarcode.com
GS1 - 12 Generation In C#.NET
Using Barcode creation for .NET Control to generate, create UPC Symbol image in .NET applications.
www.OnBarcode.com
To implement the conversion operator, you still use the keyword operator, but instead of the symbol you re overriding, you use the type that you re converting to. For example, to convert your Fraction to an int, you d do this:
Barcode Maker In Visual C#
Using Barcode encoder for VS .NET Control to generate, create Barcode image in .NET framework applications.
www.OnBarcode.com
Generate Leitcode In C#.NET
Using Barcode generation for .NET framework Control to generate, create Leitcode image in .NET framework applications.
www.OnBarcode.com
public static implicit operator Fraction( int theInt )
Recognizing Code 128A In Java
Using Barcode scanner for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
Reading Code 128C In None
Using Barcode recognizer for Software Control to read, scan read, scan image in Software applications.
www.OnBarcode.com
You use the keyword implicit when the conversion is guaranteed to succeed and no information will be lost; otherwise, you use explicit. implicit and explicit are actually operators, often called cast or casting operators because their job is to cast from one type to another (int to Fraction or Fraction to int). Example 12-3 illustrates how you might implement implicit and explicit conversions in your Fraction class. We ve omitted the overloaded addition and equality operators from the example code in the book, because those haven t changed, but they re still there. We ll explain how it works afterward.
Decode PDF417 In Java
Using Barcode recognizer for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
GS1 128 Creation In Java
Using Barcode encoder for Eclipse BIRT Control to generate, create EAN / UCC - 14 image in BIRT applications.
www.OnBarcode.com
using using using using System; System.Collections.Generic; System.Linq; System.Text;
Make Barcode In Java
Using Barcode drawer for Java Control to generate, create Barcode image in Java applications.
www.OnBarcode.com
Generating Barcode In Objective-C
Using Barcode creator for iPad Control to generate, create Barcode image in iPad applications.
www.OnBarcode.com
namespace Example_12_3_ _ _ _Conversion_Operators { public class Fraction { private int numerator; private int denominator; // create a fraction by passing in the numerator // and denominator
Generate Matrix In .NET Framework
Using Barcode drawer for .NET framework Control to generate, create Matrix image in Visual Studio .NET applications.
www.OnBarcode.com
Generate Barcode In VS .NET
Using Barcode creator for .NET Control to generate, create Barcode image in .NET applications.
www.OnBarcode.com
|
Encoding Barcode In Visual Basic .NET
Using Barcode printer for Visual Studio .NET Control to generate, create Barcode image in .NET framework applications.
www.OnBarcode.com
Draw Barcode In Java
Using Barcode encoder for BIRT reports Control to generate, create Barcode image in BIRT reports applications.
www.OnBarcode.com
12: Operator Overloading
Encode EAN 13 In Visual Studio .NET
Using Barcode maker for Reporting Service Control to generate, create EAN / UCC - 13 image in Reporting Service applications.
www.OnBarcode.com
ECC200 Decoder In Java
Using Barcode decoder for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
public Fraction(int numerator, int denominator) { this.numerator = numerator; this.denominator = denominator; } // overload the constructor to create a // fraction from a whole number public Fraction(int wholeNumber) { Console.WriteLine("In constructor taking a whole number"); numerator = wholeNumber; denominator = 1; } // convert ints to Fractions implicitly public static implicit operator Fraction(int theInt) { Console.WriteLine("Implicitly converting int to Fraction"); return new Fraction(theInt); } // convert Fractions to ints explicitly public static explicit operator int(Fraction theFraction) { Console.WriteLine("Explicitly converting Fraction to int"); return theFraction.numerator / theFraction.denominator; } // operator + goes here // equality operators go here // return a string representation of the fraction public override string ToString( ) { String s = numerator.ToString( ) + "/" + denominator.ToString( ); return s; } } public class Tester { public void Run( ) { Fraction f1 = new Fraction(3, 4); Fraction f2 = new Fraction(2, 4); Fraction f3 = f1 + f2; Console.WriteLine("adding f3 + 5..."); Fraction f4 = f3 + 5; Console.WriteLine("f3 + 5 = f4: {0}", f4.ToString( ));
Conversion Operators |
Console.WriteLine("\nAssigning f4 to an int..."); int truncated = (int)f4; Console.WriteLine("When you truncate f4 you get {0}", truncated); } static void Main( ) { Tester t = new Tester( ); t.Run( ); } } }
The output looks like this:
adding f3 + 5... Implicitly converting int to Fraction In constructor taking a whole number f3 + 5 = f4: 25/4 Assigning f4 to an int... Explicitly converting Fraction to int When you truncate f4 you get 6
In Example 12-3, you add a second constructor that takes a whole number and creates a Fraction:
public Fraction(int wholeNumber) { Console.WriteLine("In constructor taking a whole number"); numerator = wholeNumber; denominator = 1; }
Notice that in this and the following code samples, you add WriteLine( ) statements to indicate when you ve entered the method. This is an alternative to stepping through in a debugger. Although using the debugger is usually more effective, this kind of output can help you trace the execution of your program for review at a later time.
You want to be able to convert Fractions to and from ints. To do so, you create the conversion operators. As discussed previously, converting from a Fraction to an int requires truncating the value, and so must be explicit:
public static explicit operator int(Fraction theFraction) { Console.WriteLine("Explicitly converting Fraction to int"); return theFraction.numerator / theFraction.denominator; }
|
Copyright © OnBarcode.com . All rights reserved.