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Operator Overloading Sample (Visual Basic)

Visual Studio 2008

This solution illustrates the concepts and usage of overloaded operators, using U.S. Dollars and Euros as an example.

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This sample code is intended to illustrate a concept, and it shows only the code that is relevant to that concept. It may not meet the security requirements for a specific environment, and it should not be used exactly as shown. We recommend that you add security and error-handling code to make your projects more secure and robust. Microsoft provides this sample code "AS IS" with no warranties.

To run this sample

  • Press F5.

The sample consists of two classes, EURO, representing Euros, and USD, representing U.S. Dollars. Form1 acts as a test application for the two classes. Users can enter various values for USD, execute the operators, and convert USD to EURO.

The following programming techniques are demonstrated:

  • Overloaded operators. The USD class has these overloaded operators: constructor, +, -, *, /.

  • Narrowing and Widening operators. Both the EURO and USD classes have widening and narrowing conversion to and from Double.