Function Parser for C++ Parse and evaluate a mathematical function from a string!
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C++ library c++ parser function function parser

Function Parser for C++ Description

Parse and evaluate a mathematical function from a string! Function Parser for C++ is a C++ library that offers a class which can be used to parse and evaluate a mathematical function from a string (which might be eg. requested from the user). The syntax of the function string is similar to mathematical expressions written in C/C++ (the exact syntax is specified in the documentation below). The function can then be evaluated with different values of variables.For example, a function like "sin(sqrt(x*x+y*y))" can be parsed from a string (either std::string or a C-style string) and then evaluated with different values of x and y. This library can be useful for evaluating user-inputted functions, or in some cases interpreting mathematical expressions in a scripting language.This library aims for maximum speed in both parsing and evaluation, while keeping maximum portability. The library should compile and work with any standard-conforming C++ compiler.Different numerical types are supported: double, float, long double, long int, multiple-precision floating point numbers using the MPFR library, and arbitrary precision integers using the GMP library. (Note that it's not necessary for these two libraries to exist in the system in order to use the Function Parser library with the other numerical types. Support for these libraries is optionally compiled in using preprocessor settings.)This Library is distributed under the Lesser General Public License (LGPL) version 3.

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