↩ 🔵 🔵 🔵 ❪✺❫ C Concepts ○ ❪✺₀❫ Language Concepts ○ C++ ○˒ ❪✺₀❫ C++ Portals ○ ❪✺₁❫ C++ Classes ○ ❪✺₃❫ C++ Particulars ○ ❪✺₄❫ C++ Sets ○ ❪✺_❫ C++ Subs ○