Hi =]
When Should I use pointer in functions?
example:
int something(int *i)
int something(int i)
Thanks
Hi =]
When Should I use pointer in functions?
example:
int something(int *i)
int something(int i)
Thanks
when you need change something you will have to pass a pointer to it.
>> when you need change something you will have to pass a pointer to it.
Not always, or else there wouldn't be a const attribute.
Also if you are passing an array to the function.
Psss by value == no pointer
pass by reference = use pointers as C does not have the reference oprerator '&'
Double Helix STL
No but it does have the address operator '&', as Brian said you should pass a pointer when you wish to change its value, passing by value also uses more resources.
If you don't mind, I'd like to know how you come to this conclusion. Are you referring to the passing of structs or C++ objects?Originally Posted by zacs7
Last edited by MacGyver; 05-20-2007 at 04:13 AM. Reason: Correction
passing pointer - you are taking sizeof(void*) bytes on stack
passing struct - you allocating whole struct on stack (and instead of copying just pointer to the temp var - you need to copy all the struct there which can take more time)
All problems in computer science can be solved by another level of indirection,
except for the problem of too many layers of indirection.
– David J. Wheeler
Structs weren't being discussed prior to this, so that is why I'm asking if that is what he was referring to. The example given by the OP was using integers
I was talking about the use of passing the address rather the value (mainly stucts). And I read the 'idea' in a book...
