This is an intuitive arbitrary-precision decimal floating-point number library for non-critical tasks and testing. The library does not adhere to any standard, but was inspired by DEC64.
git submodule update --init
g++ -std=c++2a -Ofast -s mandelbrot.cpp -o m
em++ -std=c++20 -O3 -s eps.cpp -o e.js
dpp is compatible with the C++ Standard Library and you can use the standard math library implementations (e.g., std::cos(0_d32), ...) or, preferably, write your own.