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Possible Duplicate:
Pass by Reference / Value in C++
I was wondering what the difference is between a call by value/reference/name. And why would it be beneficial to use one over another?
call by value: a copy of the parameters is passed to the function
call be reference: no extra copy is made, the caller’s variable is passed directly.
Major difference is that one extra unnecessary copy is made in call by value paradigm… You should always use call be reference (or const reference) unless a callee needs to modify the variable and you don’t want the changes to your caller’s variable…