Linking ex3 ...
objs/main.o: In function `main':
main.cpp:(.text+0x9c): undefined reference to `all_messages::all_messages()'
main.cpp:(.text+0xa4): undefined reference to `all_messages::printWelcomeMessage()'
main.cpp:(.text+0xb3): undefined reference to `mainFactory::mainFactory()'
main.cpp:(.text+0xd2): undefined reference to `mainFactory::execute(player*)'
main.cpp:(.text+0x104): undefined reference to `mainFactory::~mainFactory()'
main.cpp:(.text+0x114): undefined reference to `mainFactory::~mainFactory()'
main.cpp:(.text+0x124): undefined reference to `all_messages::~all_messages()'
main.cpp:(.text+0x131): undefined reference to `all_messages::~all_messages()'
collect2: ld returned 1 exit status
make: *** [ex3] Error 1