HEAAN is software library that implements homomorphic encryption (HE) that supports fixed point arithmetics. This library supports approximate operations between rational numbers. The approximate error depends on some parameters and almost same with floating point operation errors. The scheme in this library is on the paper "Homomorphic Encryption for Arithmetic of Approximate Numbers" (https://eprint.iacr.org/2016/421.pdf).
This library does not contain bootstrapping, you can find the library with bootstrapping in https://github.com/kimandrik/HEAANBOOT
This library is written by c++ and using NTL library (http://www.shoup.net/ntl/).
You can make a static library by typing make all in the /lib directory. After successful compilation you can find a static library libHEAAN.a in the /lib directory.
You can run a test program. You need uncomment tests you need in /src/HEAAN.cpp and type make all in the /run directory. After successful compilation, you can see HEAAN file in the /run directory. To run the code type ./HEAAN
We checked the program was working well on Ubuntu 16.04.2 LTS. You need to install NTL (with GMP), pThread, libraries.