<div>
ok I think I I get it... so basically when I call by reference the parameter in the function has to be a variable that already exits, and if its value changes inside the function then its original value is changed too outside the function. &nbsp;if I call by value then whatever change happens to the parameter inside the function has to effect on its value after the function has been called, the value of the parameter remains the same.<br />
<br />

</div>


ok I think I I get it... so basically when I call by reference the parameter in the function has to be a variable that already exits, and if its value changes inside the function then its original value is changed too outside the function.  if I call by value then whatever change happens to the parameter inside the function has to effect on its value after the function has been called, the value of the parameter remains the same.



<div>
Yes, that pretty much sums it up. Now, if you thing the above sample to pass objects instead of integers, you have the big picture.
</div>


Yes, that pretty much sums it up. Now, if you thing the above sample to pass objects instead of integers, you have the big picture.

<div>
<div class="content wysiwyg-content">
I don't really think that I understand the difference between calling by value and calling by reference. <br />
<br />
When I call by value, the function doesn't modify variables in the class, but it only creates local variables inside the function? &nbsp;And when I call by reference, the function actually modifies the variables?<br />
<br />
I'm confused. &nbsp;I've looked online, but I just don't get it. &nbsp;Can anybody give me as simple Barney style explanation? 
</div>
</div>


I don't really think that I understand the difference between calling by value and calling by reference. 

When I call by value, the function doesn't modify variables in the class, but it only creates local variables inside the function?  And when I call by reference, the function actually modifies the variables?

I'm confused.  I've looked online, but I just don't get it.  Can anybody give me as simple Barney style explanation? 

C++ Call by reference VS Call by value

Development in most programming languages is frequently done with an editor or integrated development environment (IDE). An IDE is a software application that provide comprehensive facilities to computer programmers for software development. An IDE normally consists of a source code editor, build automation tools and a debugger. XCode, Visual Studio, Adobe Dreamweaver and Eclipse are some of the more popular development tools, but an editor or IDE can be anything from simple text editors to sophisticated programs. Related topics: All programming and development language, database and web based content management systems topics

Editors IDEs

C++ is an intermediate-level general-purpose programming language, not to be confused with C or C#. It was developed as a set of extensions to the C programming language to improve type-safety and add support for automatic resource management, object-orientation, generic programming, and exception handling, among other features.

C is a general-purpose, imperative computer programming language, supporting structured programming, lexical variable scope and recursion, while a static type system prevents many unintended operations. By design, C provides constructs that map efficiently to typical machine instructions, so it has found lasting use in applications that had formerly been coded in assembly language, including operating systems as well as various application software for computers ranging from supercomputers to embedded systems. It is distinct from C++ (which has its roots in C) and C#, and many later languages have borrowed directly or indirectly from C.