From: H (h.v.niekerk_at_[hidden])
Date: 2005-06-22 07:13:52
Rob Stewart wrote:
> From: H <h.v.niekerk_at_[hidden]>
>
>>Martin Bonner wrote:
>>
>>>From: H. van Niekerk [mailto:h.v.niekerk_at_[hidden]]
>>>
>>>Incidentally, I don't think the presence of three .cpp files is directly
>>>relevent. I suspect that the relevent factor is that you have three
>>>*functions*, and your problem is passing the data between them.
>>>
>>
>>Thank you for your response. I hope the code below explains more:
>>
>>Master.cpp
>>{
>> Client c;
>> c.readFromSatellite(input);
>> cout << "input = " << input << endl;
>>}
>>
>>Client.cpp
>>{
>> Satellite s;
>>
>> readFromSatellite(input)
>> {
>> s.readFromInterface(input);
>> return input;
>> }
>>}
>>
>>Satellite.cpp
>>{
>> readFromInterface(input)
>> {
>> // Here the actual reading is done
>> fti->writeAndReadAllData(output, input);
>> return input;
>> }
>>}
>
>
> As Martin said, the separate files aren't relevant. Also, the
> usage and declarations of your functions aren't consistent.
>
> Let's see if I can recast your problem to something a little
> simpler to discuss:
>
> void function2(some_type data) // stores stuff in caller's object
> {
> read_something_from_somewhere(data);
> }
>
> void function1(some_type data) // stores stuff in caller's object
> {
> function2(data);
> }
>
> void function3(some_type data)
> {
> // do something useful with data
> }
>
> int main()
> {
> some_type data; // some pointer type
> function1(data); // stores stuff in data
> function3(data);
> }
>
> Is that a good approximation of what you want?
>
> If so, some_type should be boost::shared_ptr<something> and the
> rest should just work. Of course, you can avoid using
> boost::shared_ptr if function1() and function2() take non-const
> references to some_type:
>
> void function2(some_type & data) // stores stuff in caller's object
> {
> read_something_from_somewhere(data);
> }
>
> void function1(some_type & data) // stores stuff in caller's object
> {
> function2(data);
> }
>
> void function3(some_type const & data)
> {
> // do something useful with data
> }
>
> int main()
> {
> some_type data; // not a pointer type
> function1(data); // stores stuff in data
> function3(data);
> }
>
After reviewing the groups on this news-server, I think I'm posting to
the wrong group. If you agree with that view, please let me know. I'll
follow up to the user group then.
H.