passing by address vs passing by reference

This is a discussion on passing by address vs passing by reference within the C++ Programming forums, part of the General Programming Boards category; The phrase "pass by reference" was used in C even before C++ to refer to passing data via a pointer ...

  1. #16
    Programming Sex-God Polymorphic OOP's Avatar
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    The phrase "pass by reference" was used in C even before C++ to refer to passing data via a pointer to the location of the object.

    Passing a pointer by value can be looked at as passing a value by reference. Passing by reference just means that you aren't copying the data that you will be directly working with, you are dealing with it indirectly.

    The concept of passing by refernce is the same in both C and C++, it's just that things become more confusing in terms of the because in C++ there are more ways of doing it and because there actually is a such thing as a "reference."
    Last edited by Polymorphic OOP; 01-09-2003 at 12:09 AM.

  2. #17
    Blank
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    In c, they needed a way to simulate a pascal function such
    as
    Code:
    procedure swap(var a : integer, var b : integer)
    begin
         t : integer;
     
         t = a;
         a = b;
         b = t;
    end
    It's been a long time since I programed in pascal but
    the var modifier makes the variables pass by referance.
    The usual definition of pass by referance is that the caller
    can modify the variable not just what the variable points to.
    But this leaves out c++ const pass by referance.

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