What is more useful in functions?

[Unregistered]

What is more practical, call by value, or call by reference for most computation projects? Thanks

[The V.]

Are you asking whether you should pass arguments by reference, or value?

It all depends on the application, and the type of parameter. A good rule of thumb is:

* If you are passing a parameter which will be changed/set by the function, pass by reference.
* If you are passing a parameter whose size is considerably larger than 4 bytes (the size of the address) pass by reference.
* If the size of the parameter is small, and the parameter does not need modification, pass by value.