A math Library to calculate strings

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Hi guys,
I have a string such as "x = 1, y = 2", and then I want to calculate the result of string "x + y" or "x * y", does any library can implement what I want???
Thanks very much!

Posted 10-Jun-15 23:18pm

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Andy Lanng · Answer 1 · 2015-06-10T23:46:00

Solution 1

Nope. You may find an API but I'd write one myself.

Look at the below example of how to parse arithmetic strings using stacked operators

There may be a API you can pull out of it:
Math Parser .NET C#[^]

Posted 10-Jun-15 23:46pm

Andy Lanng

Stefan_Lang · Answer 2 · 2015-06-11T02:44:00

This has nothing to do with math. Consequently you don't need a math library, but an expression parser: https://www.google.ch/search?q=experession+parser&ie=utf-8&oe=utf-8&gws_rd=cr&ei=D4J5VZmaHoKQsAGDh6eYBw#q=expression+parser+C%2B%2B[^]

The first hit on that search already looks promising. https://fastmathparser.codeplex.com/[^]

P.S.:
There are also suitable hits on this site:
Fast Mathematical Expressions Parser[^]
CalcStar: A C++ Math Expression Evaluator[^]