asa147_test, a C++ program which calls asa147() to evaluate the incomplete Gamma function.
The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.
ASA147 is available in a C version and a C++ version and a FORTRAN90 version and a MATLAB version.
asa147, a C++ library which evaluates the incomplete Gamma function, by Chi Leung Lau. This is a version of Applied Statistics Algorithm 147.