calculations with long decimals

This is a discussion on calculations with long decimals within the C++ Programming forums, part of the General Programming Boards category; Hello I was searching around for libraries that do these kind of calculations but I got lost, for example I ...

  1. #1
    nik
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    calculations with long decimals

    Hello

    I was searching around for libraries that do these kind of calculations but I got lost, for example I searched for gmplib, I downloaded it but couldn't understand how to use it, I would just like to have a simple cpp and header file which does these kind of calculations not a huge library.

    But assuming that someone has done this work, there has to be some kind of algorithm that was used.

    I'm thinking of creating my own class, but I'm not sure how to start.

    can someone provide me with some help? I'm totally confused

    PS: I want to use these calculations in order to find out PI, there are plenty algorithms online about this, but can't figure out how to make calculations with large decimals.

    thanks

  2. #2
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    try the eigen library:

    Main Page - Eigen

    it's all headers and is quite easy to play with (I added long doubles to the matrix and vector types really easily, even though I had never done any templating before), don't put it in your linker's list tho becuase that'll cause problems, just in your include's list.

    License: LGPL3+ & GPL2+

    though I could be wrong about this suggestion, I am not sure it supplies really big numbers. Sorry man.

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