Re: [Boost-users] Questions about Boost multiprecision library.

*I have heard that there are some strange results that can happen if you are quizzing multiprecision for trigonometry and try to keep using the double type.  Is this true, so that I can just kee relying on the std library instead?

Sorry don't understand the question.

-What is the name of the 64 bit windows .dll, or .dll files, that are the ones for the multiprecision library?

There are none - it's header only.

-If I wish to go into arbitrary precision and scale numbers, what is the type I should use for an *integer*?  What is the #include statement I should use, and how do I specify the number of whole number points and decimal points, before starting my operations?

and how do I specify the number of whole number points and decimal

What kind of integer?  Fixed precision or arbitrary precision? Suggest you start with: #include using boost::multiprecision::int1024_t;   // fixed precision 1024-bit integer, or: using boost::multiprecision::cpp_int;    // arbitrary precision integer See https://www.boost.org/doc/libs/1_66_0/libs/multiprecision/doc/html/boost_mul... for other typedefs and examples. points,before starting my operations? That question makes no sense for integer types.

-If I wish to go into arbitrary precision and scale numbers, what is the type I should use for a *rational number*? What is the #include statement I should use, and how do I specify the number of whole number points and decimal points, before starting my operations?

If you want arbitrary precision then try: #include using boost::multiprecision::cpp_rational;    // arbitrary precision rational or: #include #include using boost::multiprecision::int1024_t;   // fixed precision 1024-bit integer, or: typedef boost::rational<int1024> rational_1024_t;  // 1024 bit fixed precision rational As before your other questions make no sense for these types. See https://www.boost.org/doc/libs/1_66_0/libs/multiprecision/doc/html/boost_mul...

-For these two types, I wish to do sine, cosine, tangent, arcsine, arccosine, arctangent, base 10 logarithm, base e logarithm, power, nth root.  I also want to obtain pi, but also Euler's constant, to any number of significang figure or decimal places that I would like.

Really??? Eulers constant as an integer?  I think you need to re-think that question. Best, John. --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus