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Started by Servant of the Lord March 04, 2006 04:07 PM

7 comments, last by Servant of the Lord 18 years, 1 month ago

Servant of the Lord

33,739

Author

March 04, 2006 04:07 PM

my prog is popping up a 'parser error' with the following line:


extern class beast.GreenSlime;

whats the correct way to declare this in a header? using Dev C++, thanks.

Enigma

1,410

March 04, 2006 04:19 PM

I'm not surprised. Are you trying to forward declare a class? A variable? A class contained within another class? Something else?

Σnigma

Servant of the Lord

33,739

Author

March 04, 2006 04:22 PM

I have my class, beast, and my object, GreenSlime, and need to declare(?) them in a header file. It needs to be able to be viewed by multiple files in the same project so I am declaring it in 'main.h'.

rileyriley

235

March 04, 2006 04:28 PM

try:

extern beast GreenSlime;

in your header file with

beast GreenSlime;

in your cpp file. The "extern beast GreenSlime;" is the declaration of your variable (GreenSlime) and that declaration will be visible to all of the files that include the header file. The "beast GreenSlime;" in your cpp file should only be compiled once. The linking step of building will take care of making sure all of your files are using the same object.

--Riley

Servant of the Lord

33,739

Author

March 04, 2006 04:49 PM

Okay I did so and it works. I get a different error later in the compile though:

[Linker error]undefined reference to 'GreenSlime'

It was repeated several times to; and I think it was refering to the following code:

if(enemy = 1){    Ehp = GreenSlime.Hp;    Edmg = GreenSlime.Dmg;    Edef = GreenSlime.Def;    Eexp = GreenSlime.Exp;    Ecoin = GreenSlime.Coin;    Ename = GreenSlime.Name;}

Enigma

1,410

March 04, 2006 04:53 PM

As well as a declaration you need a definition in exactly one source file:

beast GreenSlime;

Σnigma

Servant of the Lord

33,739

Author

March 04, 2006 05:03 PM

Ahh... thanks, everything works fine now.

Enigma

1,410

March 04, 2006 05:09 PM

Quote:Original post by Servant of the Lord
if(enemy = 1)

Just spotted that. I assume you meant if (enemy == 1). Assuming this is an error in your source and not a forum transcription error your compiler should have warned you about an assignment in a conditional. Listen to it. If it's not issuing a warning then find the compiler option that will make it.

Σnigma

Servant of the Lord

33,739

Author

March 04, 2006 05:46 PM

Quote:Original post by Enigma
Quote:Original post by Servant of the Lord
if(enemy = 1)
Just spotted that. I assume you meant if (enemy == 1). Assuming this is an error in your source and not a forum transcription error your compiler should have warned you about an assignment in a conditional. Listen to it. If it's not issuing a warning then find the compiler option that will make it.

Σnigma

Whoops, I do mean '=='. I wonder why my compiler missed that? I wonder how I missed that?

Header Error

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