- minimal UI/terminal interface if possible
- hopefully some security/encryption
- multithreading?
- tcp sockets for delivery of bytes
- ip address handling [what to do when firewall or NAT]
- multithreading probably necessary to concurrently send + receive messages
- terminal interface with std::cout and std::cin is possible but bad, use minimal graphics library such as 'Dear ImGUI' or 'Win32 API'
- data encryption necessary
- authentication necessary
- portability, compatibility?
- minimal dependancies
- error handling/connection issues [make these good, they're bound to happen]
- packet loss?
- static linking for portability
- optimization flags '-02' or '-03'
Qt for GUI
Qt for GUI (g4g)
