CodeBlocks not building my project

Question

Every time I click the \'run\' or \'build and run\' options in CodeBlocks for Mac OSX I get this dialogue:

Answer 1

You declare anMyArray in your header file and then include it in both your cpp files, which means your variable is getting declared twice because of header expansion.

Move it to your main.cpp file.

Answer 2

It's because you define the variable anArray in the header file. When its included in two translation units it's defined twice, giving you the duplicate symbol error.

Just declare it in the header file

extern int anMyArray[9];

and define it in one (and only one) source file.