🚀 go-pugleaf

"Antony Carr" <antony.carr@btinternet.com> wrote in message
news:9cms6r$emm$1@neptunium.btinternet.com...
> Right heres a question for you all, i am a little stuck and hope someone
can
> help me...
> The best way of describing my problem is by showing you an example of what
i
> am trying to do, so here it is...
> I have a two files, a .cpp file containing the main() etc, and a header
file
> (bank.hpp).
> inside the header file there are two classes BankAccount and BankDB.
> BankAccount contains the account name, & balance. BankDB amongst other
> things creats for each instance of BankAccount the name in which the
account
> is held. Now heres the problem, i can for a single instance of BankAccount
> set the name & Balance indervidually , however how would you go about
> calling from the class of BankDB an instance of BankAccount ??? Whenever i
> try i get error messagess generated. I have attatched to this message the
> two files concerned. If any one could help i would be eternally greatfull
> :-)
>
> Antony Carr
> antony.carr@btinternet.com
>

You need something like this

class BankAccount
{
    // whatever
};

class BankDB
{
public:
    // whatever
private:
    int num_of_accounts;
    BankAccount the_accounts[100];
};

You see? The BankDB object holds (upto) 100 BankAccount objects. This is how
BankDb 'calls' an instance of BankAccount. E.g.

void BankDB::credit_by_name(const char *a_name, int an_amount)
{
    int n = lookup_name(a_name);
    the_accounts[n].credit(an_amount);
}

lookup_name is some function to work out which account we are interested in
from the name. Then you use the_account[n].credit to credit the actual
account.

This approach has the limitation that you can only have a maximum of 100
account in BankDB, there are various ways around that but at your level of
skill I'd stick with that for now.

john