Dawson integral, also known as Dawson function, is defined as

DawsonIntegral subroutine calculates the Dawson integral using piecewise rational approximation.

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C#

C# 1.0 source.
dawson.csharp.zip - Dawson integral

C++

C++ source.
dawson.cpp.zip - Dawson integral
ablas.zip - optimized basic linear algebra subroutines with SSE2 support (for C++ sources only)

Delphi

Delphi source.
Can be compiled under FPC (in Delphi compatibility mode).
dawson.delphi.zip - Dawson integral

Visual Basic 6

Visual Basic 6 source.
dawson.vb6.zip - Dawson integral

Zonnon ^beta

Zonnon source.
Zonnon is an experimental language developed at ETH Zurich.
See www.zonnon.ethz.ch for more information.
dawson.zonnon.zip - Dawson integral