C++入门专周的3个综合项目实践，含详细的设计文档:（1）新生报到管理系统 （2）员工管理系统 （3）高精度算式测验。-C++ 3 个 integrated projects designed introductory week practice, with detailed design documents: (1) new report management system (2) Employee Management System (3) high-precision test equ