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Pointers and functions

Started by guyaton Apr 15, 2004 at 5:35 PM 2 replies 200+ views

Original Post

Apr 15, 2004 at 5:35 PM

What I am trying to do is send a pointer in a function, and inside that function create that pointer of some size (which can only be determined inside the function) and then store information to that pointer. When I exit the function I want to be able to access/use that information. How do I do that? ~Guyaton

alnite

410

alnite

Apr 15, 2004 at 5:42 PM

function_name( data_type** ptr )

OR

function_name( data_type*& ptr )

guyaton

Author

guyaton

Apr 15, 2004 at 5:48 PM

That was much simpler that I was trying to do! thnx!

~Guyaton

Promit

Mod

1,082

Promit

Apr 15, 2004 at 5:58 PM

I''ll just butt in and recommend the latter form:
function_name( data_type*& ptr)
because it forces the pointer itself to be a valid variable (though it does not necessarily point to something valid!). If you use data_type**, it''ll force you to do another NULL check.

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