qiray / BigInteger

Arbitrary-precision integer library in C++

BigInteger

Arbitrary-precision integer library in C++

Dependencies

For build this library you need:

• C++ compiler with C++11 or C++03 support;

• C++ standard headers;

• Compiler -m32 flag support to create 32-bit version;

• ar;

• MinGW C++ compiler i686-w64-mingw32-g++ to build for Windows;

• zip to create release archive.

Build

For building library run

make

This command will create Release folder with library and headers.

There are some extra flags and arguments:

notest - build library only (without tests)

OS=win - build for Windows

NO_DEBUG=true - disable exceptions log

PLATFORM=x86 - build 32-bit version

STD=c++03 - Use C++03 standard

clean - clean current build

allclean - clean current build and release folder

For example to build library for Windows with tests and without exceptions' logging:

make OS=win NO_DEBUG=true

You can also build all possible libraries for current OS and Windows by

bash build_all.sh

Usage

This library provides BigInteger class with simple interface - BigInteger can be used as standard integer types:

#include <iostream>
#include <biginteger.h>

int main() {
    BigInteger a(1000), b("340282366920938463463374607431768211456");
    BigInteger c = fact(a);
    std::cout << a + b << std::endl;
    std::cout << c - b << std::endl;
    std::cout << a * b << std::endl;
    std::cout << b / a << std::endl;
    std::cout << b % a << std::endl;
    return 0;
}

For more information see tests.cpp file.

Linkinig

You should link BigInteger library to your project to make it work. Please read docs for your IDE or compiler.

Testing

To compile the tests, you need to execute

make tests

It will produce tests.exe or tests.out file. Run this file. If there is no error there should be the text:

Tests ended successfully

Projects using BigInteger

Xlife - a popular freeware program for the simulation of cellular automata.

Contact

You are welcome to open new issue if you have any questions or bugs. Please also mention the version of the library you are using and the version of your compiler and operating system.

If your project uses BigInteger library please let me know and leave a link to this repo in your project.

License

The library is licensed under the GNU GPL 3. For more information see the LICENSE file.