**PhysMathCalc** is a zero-dependency, single-executable Windows desktop utility written entirely in ANSI C using the native Win32 API. Operating as a background system tray process, it exposes a hierarchical right-click context menu containing **88 pre-configured mathematical and physical formulas** across algebra, geometry, trigonometry, statistics, mechanics, electromagnetism, thermodynamics, optics, and modern physics. Selecting any menu item spawns a lightweight, modeless calculator dialog that parses comma/space/tab-separated numerical inputs, executes domain-specific backend functions, and renders results with scientific formatting (`%.8g` precision) and unit annotations. The application leverages a pure event-driven architecture with dynamic menu generation, static command dispatching, and defensive input validation—requiring no installation, elevated privileges, or external DLLs. Its compact design (~50 KB binary) ensures minimal memory footprint while delivering instant access to essential engineering calculations, academic reference tools, and classroom demonstrations. Built with strict ANSI compliance and explicit `*A` API suffixes, PhysMathCalc maintains full compatibility with Windows XP through 11 (x86/x64). The modular `Formula` struct and function-pointer-based calculation engine enable straightforward extension for custom formulas. Ideal for students, educators, engineers, and developers seeking a distraction-free, offline-capable computational aid, this project exemplifies efficient native Windows programming—merging scientific utility with minimalist, maintainable C code. Licensed under MIT, PhysMathCalc offers complete transparency for learning, customization, or integration into larger toolchains. 🔬🧮💻

physicsmathtool

PhysMathCalc is a zero-dependency, single-executable Windows

PhysMathCalc is a zero-dependency, single-executable Windows