The simpleexprparser from nibred

simpleexprparser's Introduction

Simple math parser

The Math Parser is a simple C# library that allows you to evaluate mathematical expressions containing basic operators and parentheses.

Features

Supports operations:
- Addition: +
- Subtraction: -
- Multiplication: *
- Division: /
- Equality: =
- Inequality: !=
- Modulus (remainder): %
Handles expressions with multiple levels of parentheses.
Follows the standard operator precedence rules (multiplication/division before addition/subtraction).
Provides error handling for invalid expressions or divide by zero scenarios.

Usage

Using the parser in your C# code is straightforward. Here's an example:

using ExprParser;

string expression = "24+8-(2*(12-6)-3)+14/2-(13+2*5)";

try
{
    Parser parser = new Parser();
    int result = parser.Evaluate(expression);
    Console.WriteLine("Result: " + result);
}
catch (Exception ex)
{
    Console.WriteLine("Error: " + ex.Message);
}

Error Handling

The parser provides robust error handling for various scenarios, including:

Argument Exception: If the input expression contains syntax errors or unsupported characters, a parser will be thrown with the appropriate error message.
DivideByZero Exception: If the expression involves division by zero, a parser will be thrown with an error message indicating the divide by zero scenario.

Ensure that you wrap the evaluation code in a try-catch block to handle exceptions gracefully.

Limitations

The parser currently supports only basic mathematical operations (+, -, *, /, %) and parentheses. It does not support advanced functions, trigonometry, logarithms, etc.
The parser assumes correct syntax and does not perform extensive validation or error recovery.

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