Developed a Simple Sum Calculator Tool for the hyemi0622/algorithm repository, focusing on streamlining basic arithmetic validation within algorithmic workflows. The solution was implemented in C++ and centered around a reusable add function, paired with a main interface to facilitate straightforward user interaction. This approach reduced repetitive boilerplate in testing scenarios and established a foundation for future expansion to additional operations. The work emphasized algorithm implementation skills and delivered a ready-to-use utility for validating math-related components and unit tests. No bugs were addressed during this period, reflecting a targeted effort on feature delivery and clean, maintainable code structure.