[Tier 2] Adding own classes - GameCreators Forum

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CodeTrasher

12

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Joined: 18th Jul 2012

Location: Tampere, Finland

Posted: 13th Jul 2017 10:11 Edited at: 13th Jul 2017 12:50

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Hi all,

I'm trying to make a simple project in C++. I am able to build and run the template_linux project without issues but I can't add any custom classes to the project. I can't create an object either by calling:

+ Code Snippet

MyClass obj;
obj.set(<some parameters>);

or by instancing it with 'new':

+ Code Snippet

MyClass *obj;
obj = new MyClass(<some parameters>);

I saw that Mobiius had similar issues with his C++ code back in 2015. Here's his thread.

I haven't programmed C++ stuff in ages but I believe I'm doing it right, but for some reason template doesn't recognise my object since Netbeans is giving me undefined reference error message.

Can somebody point me in the right direction here, please? Thank you!

EDIT: I may have found the problem. All I needed to do was to add my class inside AppGameKit namespace.

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Lucas Tiridath

AGK Developer

16

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Joined: 28th Sep 2008

Location: Kings Langley, UK

Posted: 14th Jul 2017 13:14

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Quote: "All I needed to do was to add my class inside AppGameKit namespace."

Hey. So you shouldn't have to add your classes inside the agk namespace to get them to work.

Quote: "Netbeans is giving me undefined reference error message."

It's hard to know for sure what's going wrong without seeing the actual error message. Do you mean you're getting linker errors? If so are you sure that the makefile is building your new source files? Or do you mean you're getting undefined symbols? If so, that suggests you might be forgetting to include a header somewhere.

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CodeTrasher

12

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Joined: 18th Jul 2012

Location: Tampere, Finland

Posted: 15th Jul 2017 20:20

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Thanks for replying, Lucas Tiridath, but I think what was the matter now.

When testing my custom class, I had the simple method to print hello world to stdout in the header file, but after expanding my class I moved the implementation from header to source file. That's where your hint was correct, I actually hadn't added the source file in the makefile. I tested it again, and it worked. My C++ is very rusty at the moment...

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