Several files for numerics using LCC-WIN32 (including all source files).

LCC-WIN32 is a compiler system for Windows by Jacob Navia available at for download.
It is free for non-commercial use, but please check for copyright and licence there - it also gives the latest official version.

It has a datatype 'qfloat' of 56 bytes allowing numerics with 104 digits and an 'epsilon'  of  ~ 0.109e-105 with epsilon + 1 <> 1.

For using the examples below only the file qfloat.dll from the above link is needed: it just has to be copied into the Windows
system directory. It is part of the full download, but for convenience here is a copy as single file as well: (57 kB).

 cdfN123_LCC.mws.pdf (67 kB)
    Cumulative standard normal distribution up to dimension 3 with 104 decimal places using qfloat.
    For dim <= 2 it is reasonable fast (~ 10 msec), for dim = 3 computations may need 5 - 10 seconds.
    The files (65 kB) contain the C sources and sheets to interface that to Maple and Excel.
    Some test examples with small determinant are in cdfN3_LCC.mws.pdf (Maple sheet: cdfN3_LCC.mws).

 cdfN_LCC.mws.pdf (37 kB)
    An implementation of the cumulative normal distribution giving 104 digits of exactness with interface to
    Maple and Excel. Here are the files (74 kB), containing sheets (Maple, Excel), DLL and C sources.
    Of course the full taste of exactness only can come up for small negative x, where cdfN(x) approaches 0,
    since cdfN(x) for large x becomes too close to 1, so exactness there is limited by 'epsilon' of the system.

 Using_LCC_through_Maple.mws.pdf (36 kB)
    How to call qfloat - function from Maple in a quite variable way: either user defined or directly from qfloat.dll.

 Calling_LCC_functions_from_Maple.mws.pdf (19 kB)
    How to call functions of type qfloat from Maple, files (24 kB) containing Maple sheet and sources.
    As an example the error function is treated.

 Using_LCC_through_Excel.xls.pdf (4kB)
    How to use the qfloat library from Excel, files (33 kB) containing Excel sheet, DLL and C sources.
    As an example the error function is treated. (25 kB)
    How to communicate between Excel VBA and a LCC DLL for numerical arrays (usual floating points) without Microsoft SDK.

 Creating_a_DLL_for_Excel_or_Visual_Basic_with_lcc-win32.pdf (150 kB)
    Short tutorial how to procude a DLL for use with Excel (or Maple), since I learn things best writing it down for myself ...
    Here is a html-version and here are the sources (16 kB).

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