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C4_COMPLEX_LIB\ A C++ Class for Complex Arithmetic {#c4_complex_lib-a-c-class-for-complex-arithmetic align=”center”} ==================================


C4_COMPLEX_LIB is a C++ library which defines complex numbers and the operations necessary to do arithmetic on them.

Since the ANSI C++ standard library now includes a complex class, the information described here is probably not of practical use. On the other hand, it may be helpful as a practical demonstration of how to define a useful arithmetic class.

The C4_COMPLEX class defines a c4_complex number as a pair of floats. A variable c in this class may be declared by

        c4_complex c;

The declaration can include an initialization:

        c4_complex c = c4_complex ( 1.0, 2.0 );

A variable c declared as c4_complex may be assigned a value using the c4_complex() function:

        c = c4_complex ( a, b )

where a and b are float values; the assignment

        c = c4_complex ( a )

sets the real part of c to a, and the imaginary part to 0.

A variable c declared as c4_complex may be used in addition, subtraction, multiplication, or division with another c4_complex value, or a float value:

        c3 = c1 + c2;
        c3 = c1 - c2;
        c3 = c1 * c2;
        c3 = c1 / c2;

A variable c declared as c4_complex may be conjugated, or its real or imaginary part may be produced as a float value:

        c2 = ~c;
        d1 = c1.real ( );
        d2 = c1.imaginary ( );

Licensing: {#licensing align=”center”}

The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.

Languages: {#languages align=”center”}

C4_COMPLEX_LIB is available in a C version and a C++ version.

C4LIB, a C++ library which implements certain elementary functions for “C4” or single precision complex variables using the C++ “complex “ datatype.

C8_COMPLEX_LIB, a C++ library which defines a class called c8_complex for complex numbers with double precision components.

CPP, C++ programs which includes an example of the declaration and use of complex variables.

Reference: {#reference align=”center”}

  1. Steve Oualline,\ Practical C++ Programming,\ O’Reilly & Associates, 1997,\ ISBN: 1-56592-139-9

Source Code: {#source-code align=”center”}

Examples and Tests: {#examples-and-tests align=”center”}

You can go up one level to the C++ source codes.


Last revised on 27 September 2013.