This is Mike Cowlishaw's decNumber library that implements the General Decimal Arithmetic Specification in ANSI C. This specification defines a decimal arithmetic which meets the requirements of commercial, financial, and human-oriented applications. It also matches the decimal arithmetic in the IEEE 754 Standard for Floating Point Arithmetic.
This is not literally a library in the strict sense, but a list of source files in C that are used fairly independent from one another. This becomes clear when one compiles the examples. The readme.txt is the original text explaining how to compile and to use this source code. It's advisable to read it after reading this Readme.md.
This repository has not only the original Mike Cowlishaw's source code for multiprecision decimal arithmetic in C, but also scripts that I have written to compile and run the examples. This repository is compact, easy to download and makes the use of the code much easier. The original website where this library comes from is too bulky and more difficult to walk through.
Download the repository and compile the examples using build.bat file. If you don't want -O3 optimization, comment set flag1=-O3 (that is, insert REM 🡒 REM set flag1=-O3), and uncomment REM set flag1= (that is, remove REM 🡒 set flag1=).
Open a command Windows console (black command tool, not a PowerShell) inside decNumber directory and type:
buildTo run the examples, after compiling using build.bat, just use run.bat by typing:
runDownload the repository and open build.bat in a text editor. Copy each line starting with gcc from -o forward. On a console, type gcc and paste the rest of the line that was copied. Repeat this for each example.
To run them, just copy and paste on a console each line of file run.bat.
If you don't have a C compiler and you are using a Windows 64 machine I recommend using w64devkit, whic is the C/C++ compiler that I use. You can download it here.
On Linux machines gcc is bundled with the operating system.