https://github.com/alxnull/calcex

A simple mathematical expression parser and evaluator for .NET.
https://github.com/alxnull/calcex

csharp dotnet evaluator expression-evaluator math-parser mathematics mathml netstandard parser

Last synced: 9 months ago
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A simple mathematical expression parser and evaluator for .NET.

• Host: GitHub
• URL: https://github.com/alxnull/calcex
• Owner: alxnull
• License: bsd-3-clause
• Created: 2019-09-25T07:39:44.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2019-09-25T14:45:53.000Z (over 6 years ago)
• Last Synced: 2025-04-19T09:03:44.598Z (10 months ago)
• Topics: csharp, dotnet, evaluator, expression-evaluator, math-parser, mathematics, mathml, netstandard, parser
• Language: C#
• Homepage:
• Size: 66.4 KB
• Stars: 4
• Watchers: 1
• Forks: 2
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE.txt

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README

          
# Calcex

[![Build status](https://ci.appveyor.com/api/projects/status/to343qmkhi2v5lae?svg=true)](https://ci.appveyor.com/project/alxnull/calcex)

[![](https://img.shields.io/appveyor/tests/alxnull/calcex.svg)](https://ci.appveyor.com/project/alxnull/calcex)

[![](https://img.shields.io/github/license/alxnull/calcex.svg)](https://github.com/alxnull/calcex/blob/master/LICENSE.txt)

[![](https://img.shields.io/nuget/v/calcex.core.svg)](https://www.nuget.org/packages/calcex.core/)

A simple mathematical expression parser and evaluator for .NET.

This repository contains _calcex.core_, the actual .NET parser library, the _calcex_ .NET Core CLI and a sample Windows GUI.

## Overview

**Calcex.Core** is a basic parser and evaluator library for mathematical expressions built on .NET Core.

Some functionalities are:

- support for many common arithmetic and bitwise operators (*, ^, %, &, ...)

- support for many mathematical functions (sin, ln, log, min, ...)

- user-defined variables and functions

- evaluate to double, decimal or boolean values

- compile expressions into callable delegates

- convert expressions to postfix notation and MathML strings

**Calcex.Console** contains a simple command-line interface that provides easy access to the mathematical evaluators.

**Calcex.Windows** contains _Calcex App_, a basic GUI calculator app for Windows built using WPF.

## How To (Calcex.Core)

### Simple example

```csharp

Parser parser = new Parser();

// Set a custom variable

parser.SetVariable("x", -12);

// Parse

var tree = parser.Parse("2*pi+5-x");

// Evaluate to double

double doubleResult = tree.Evaluate();

// Evaluate to decimal

decimal decimalResult = tree.EvaluateDecimal(); 

// Compile to delegate

Func func = tree.Compile("x");

```

Fore more, visit the [Calcex wiki](https://github.com/alxnull/calcex/wiki).

## License

Calcex is published under [BSD-3-Clause license](LICENSE.txt).