todo

该文件为c++的数学函数库!是一个非常有用的编程工具.它含有各种数学函数,为科学计算、工程应用等程序编写提供方便！

* Sort out "const" in prototypes, it looks odd since there are consts
for many functions which modify the state.  (Applies to both qrng and rng)

*  It would be useful to include functions to generate quasi-random
  number distributions (at least the Gaussian distribution)? obviously
  the Box-Mueller algorithm cannot be used to maintain the low
  discrepancy characteristics of the sequence, there are several
  methods suggested in the literature but it isn't at all my field so
  I'm not sure which is to be preferred. (DENISON Francis
  <[e-mail]>)