A portable C11 implementation of the deterministic 2D wave equation solver. It simulates how a disturbance spreads across a two-dimensional surface, similar to ripples through water, step by step, while keeping the output reproducible and numerically stable. Rebuilding the original Python version in C gave more direct control over memory, execution and performance, and turned the project into a lightweight module that compiles with GCC or Clang. The C implementation was tested directly against the Python reference to confirm both versions produce matching results.