从字符串计算数学函数 [英] Evaluate Mathematical Function from String

问题描述

你能给我一些关于如何在 C 中创建一个简单的数学表达式解析器的想法吗?

Can you give me some ideas about how can I make a simple mathematical expression parser in C?

用户在字符串中输入一个数学函数，并从字符串中输入我想在 C 中创建该函数的字符串.例如.x + sin(2*x)

User enters a mathematical function in a string and from the string I want to create the function in C. eg. x + sin(2*x)

-> return x + sin(2x);

提前致谢.

推荐答案

您可以解析基于Shunting-Yard Algorithm"的表达式 http://en.wikipedia.org/wiki/Shunting-yard_algorithm.您将需要扩展以处理函数调用，例如 sin、cos 等...

You can parse the expression based "Shunting-Yard Algorithm" http://en.wikipedia.org/wiki/Shunting-yard_algorithm. You will need to extend to handle the function calls such as sin, cos etc...

这篇关于从字符串计算数学函数的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！