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struct versus class

Started by zychrias Sep 24, 2004 at 1:24 AM 3 replies 950+ views

Original Post

Sep 24, 2004 at 1:24 AM

In my Google, Gamedev.net, and in books I've seen the only difference between Struct and Class is the private and public modifiers. What am I asking is if there are any other differences such as memory requirements and the usual noticable differences in how they are laid out?

snk_kid

Sep 24, 2004 at 1:30 AM

There is no difference, just struct default to public access & inheritance while class default to private.

Qw3r7yU10p!

Sep 24, 2004 at 3:31 AM

As snk_kid said.

Also I've found that with microsoft's compiler, if you forward declare something it has to be the same as the actual declaration and previous forward declarations. So in MSVC you can't have a class and forward declare it as a struct. I'm not sure whether this is standard or not.

class Jigger;
class Jigger;//multiple forward declarations are fine
struct Jigger;//not allowed in MSVC

Also, as always, see the C++ FAQ Lite

saladyears

Sep 24, 2004 at 8:51 AM

Hmm, in my VC .NET 2003, it lets me compile mismatched forward declarations, but gives me warning C4099.

Qw3r7yU10p!

Sep 24, 2004 at 8:59 AM

I should have said my (work) compiler is VC++ 6.0

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