ReactionParser

A simple C program that evaluates arithmetic expressions using the Shunting Yard algorithm. Supports:

• +, -, *, /, %, ^
• Parentheses for grouping
• Unary minus
• Floating-point numbers (doubles)

Sources and Attribution

• Original Shunting Yard algorithm implementation: literateprograms.org
• Double conversion support inspired by: Anthony DiGirolamo, GitHub gist
• Vectorized and maintained by: Jonah Huggins

Single-File vs. Header/Source Implementation

A standalone, single-file version of the library is available on the single-file branch for easy integration. It is also included in release v1.0.

Build Instructions

mkdir build
cd build
cmake ..
cmake --build .

This will create the executable ReactionParser in the build directory.

Usage

./ReactionParser "3 + 4 * 2"

Example output:

11.000000

Unit Tests

A test suite is provided in tests/test_reactionparser.c:

./test_reactionparser