game-editor.com

Seriously though, I have encountered this error too many times And I have no idea what it means.
I usually just change my code to something else (trial and error )

googles tells me this "unexpected delaration" is because of a missing header file, but that's not the case for GE.
So what i am asking is What does it mean?

You can only declare variables at the beginning of a scope. Move your FILE * declaration above the other code inside the function and it works. The error message indicates that GE is trying to treat the memset as a variable declaration.

Thank you so much! it worked

I guess that is just for GE compiler? cuz other compilers don't complain about it.

It's not just for GE, it is for the old version of C that GE uses. I'm not sure which version it is, but anyway.