Printable View
Hi,
I am trying to work on my first cpp assignment which requires me to break the code into multiple files. I also have to work with structures. I am a little confused as to where my struct has to be defined. Should it be defined in a seperate .h file and included in all other files? or should the struct be defined in a .cpp file since it is actual definition? if so how do other files see it? I request anyone to tell me how to proceed.
thanks,
livin
Most likely yes. Note that you only need to include that header in files that actually use the struct type, and your header should have header inclusion guards in case you (indirectly) include this header more than once.Quote:
Originally Posted by livin
Most likely no. It can be done this way, but I doubt it is what is asked of you since this is your "first cpp assignment which requires (you) to break the code into multiple files". If you're interested to know, search the Web for "pimpl idiom" and "opaque pointer".Quote:
Originally Posted by livin
Thanks a lot..that helped.
A struct is not a definition. It's a declaration. A declaration specifies the interpretation of a name. A definition is a declaration that also allocates storage.Quote:
Originally Posted by livin
No, a struct is not a declaration. A struct is a type. A struct declaration would be something like this:Quote:
Originally Posted by oogabooga
and a struct definition would be something like this:Code:struct X;
though of course a struct definition is also a struct declaration.Code:struct X
{
int n;
};
I suppose so. If it was a declaration then you'd be able to repeat it, but you can't (hence the need for include guards). What threw me is that it doesn't allocate storage.Quote:
Originally Posted by laserlight
You can repeat the declaration of a struct, as long as it is not the definition of the struct.Quote:
Originally Posted by oogabooga