asked on

using dynamic CArray -- need an array of structures

I am designing a CVideoList class which will hold the an
array of this structure:

struct Video
{
CString title;
int have; int want;
int inventory_number;
int noWaiting;
<<a dynamic array which will hold :
struct waitListEntry
{
CString waitName;
CString contact;
} waitList;
>>>>>

}

my trouble is :

1) when I compile, I find that CString is undefined
2) I understand how to use the templated class CArray

please explain:
1) which files to #include in my class header file
2) how to use dynamic CArray template class

Thank you in advance for your help.

ASKER CERTIFIED SOLUTION

dkremer

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RONSLOW

To use a dynamic array...

CArray<data-type, arg-type>

eg.

CArray<waitListEntry,const waitListEntry &>

this means each item in the array is a 'waitListEntry' and the member function args are 'const waitListEntry&'. For example, the template will expand to include a member function

void SetAtGrow( int nIndex, const waitListEntry& newElement );

note that 'const waitListEntry&' was used to pass an element in/out.

See the on-line help for examples (as per the answer proposed)

ehb

ASKER

Could you please expound upon deriving from CObject? Can I do this for any class I want?

I took a college level OODesign/Implementation class and deriving from CObject was never mentioned.

Thank you very much for your help!

Eric

RONSLOW

There is no need at all to derive from CObject - don't do it unless you really need the serialization.

You use the CArray<> (or CList<> or CMap<>) template classes.

These work equally well with non-CObject classes.

See my earlier comment .. Or better (for me) ask another question so I can ansewr it :-)