Very good!! After reading the C++ theory lectures more than three times elsewhere, I tried to make a TextRPG with the theories I learned, but I ran into a problem. 1. I listened to the lectures repeatedly and thought I understood them well, but I can't remember the theories I learned. 2. When I made a game in C language, it ran well even if I coded it without thinking, but I have no idea how to design a framework in C++. So, I thought I'd rather get a good source code that uses all the basic C++ grammar and analyze it to learn it, and when I got here, my skills improved tremendously. Here's how I studied. 1. While listening to the TextRPG lecture, I searched Google for grammar and concepts I didn't know (singleton design pattern, method factory, etc.) and studied theories. 2. I understood the overall framework of the code and drew it out. (At this time, I realized that rather than forcing myself to code repeatedly in a state of mental breakdown and forcing myself to do it, if I understand the overall flow and review the video while organizing that flow in my head, the efficiency increases several times and the time is shortened several times.)