C++ Does not name to a type

Question

This might be an easy question, but I cannot figure out why the compiler it\'s giving me this error. I have two classes. Agent and Environment. WHen I try to add an object

Answer 1

Your agent.h includes environment.h. The agent.h file is parsed in order from top to bottom, so when environment.h is parsed, the compiler doesn't know what an Agent is. There appears to be no reason to incude environment.h in agent.h.

Answer 2

Apart from what the comments already said, you can't have two header files include each other. There is no reason for Agent.h to include Environment.h, so if a .cpp file includes Agent.h first, it'll fail (since it will first go through Environment.h, which requires Agent).

IF you have a situation where two header files depend on each other's definitions, use forward declarations where you can, or split your header files up into more header files.