H. Guijt questions

H. Guijt answers

• Finding best color match - and reject if no shades of color available
• error: function declared 'noreturn' should not return
• c++ socket: size of the structure addrinfo
• Why is the size of an array passed to a function by reference known to the compiler in C++?
• Why can I call a function in C without declaring it but not in C++?
• How threadsafe is SQLite3?
• Why does g++ pull computations into a hot loop?
• C++ converting long hex string to binary