RTL.ComplexNumbers Sample

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This sample demonstrates various features of records.

Location

You can find the ComplexNumbers sample project at:

Description

This application provides an implementation for a record that handles complex numbers. It exemplifies operator overloading, visibility specifiers, instance methods, class methods, and class variables.

How to Use the Sample

  1. Navigate to Start | Programs | Appmethod 1.16 | Samples and open Win32OperatorOverload.dproj.
  2. Press F9 or choose Run > Run.

Files

The project has two source files:

File Contains

Vassbotn.Vcl.Complex.pas

The implementation for TComplex, a record that handles complex numbers.

Win32OperatorOverload.dpr

A program that uses TComplex instances, operators, and methods.

Classes

TComplex implements a record that manages complex numbers. It provides fields, operators, instance methods, class methods, and class variables for operations with complex numbers.

Implementation

  • A constructor is simulated by using a private class procedure and the initialization section of the unit.
  • The TComplex class overloads some of the Object Pascal operators: Add, Substract, Multiply, Divide, Negative, Equal, NotEqual, and so on.
  • TComplex contains class variables, like Symbol and SymbolBeforeImaginary, that belong to the entire class and not to individual instances.
  • TComplex implements both class methods (for example class function From(const AReal, AImaginary: Double): TComplex; static;) and instance methods, for example function ToString: System.String;.
  • Members of TComplex have different visibility specifiers: strict private, private, and public.

Uses

See Also

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