5bb
Subj : Pointers + Stuff
To   : borland.public.cpp.borlandcpp
From : Alistair
Date : Sun Jul 04 2004 05:08 pm

Hi,

I am just learning out pointers and was trying to manage assigned memory:

struct s_Something
{
    void *data;
    int length;
    int datatype; //0 - image, 1 - wav, 2 - string, 3 - etc...
    bool temp;
};

I can happily use this, e.g.

s_Something mySomething;

mySomething.data = malloc(80);
mySomething.length = 80;

then use it like

dosummet(&mySomething);
//in dosummet -> mySomething->data  etc...

Now, I create a few of these through out my app and it works fine, but here
is where i am stuck. I want to create a pointer list, if its possible, e.g.

s_Something *somethings[256];

and each something is a pointer to an object I have created like above.  The
reason is that I can then
loop the somethings and free(mySomthingx.data).

I only want the list for storing references to the objects so i can free
them.  I then pass the objects via pointers through functions etc to be
used.

so at the end of my main application loop I can loop the list of pointers,
getting the objects using memory and then see if they are temp (temporary)
and if so, i can free the memory.

Can someone give me some idea how this can be done without a lot of
technical speak, I am new to C++ and I would like to get an understanding
without long words / phrases i dont yet understand!

Thanks

Alistair

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