Join Peggy Fisher for an in-depth discussion in this video Call by value vs. call by reference, part of Up and Running with C++.
…There are two types of parameters that can be used in functions.…One is considered a call by reference and the other is a call by value.…The biggest difference is that the call by…reference allows the function and the main program…or the calling program to point to the…same address that contains the value of the variable.…So if the function changes the contents of a variable passed by reference.…The new value is now available to the main program.…
Another way to think about the call back value is that…a copy of the argument's value is passed to the function.…Changes to this value on the function do not affect the original value.…Let's take a look at two examples.…Let's start with call by value.…In this callbyvalue.cpp program we have our function defined above the main.…The comment says, this function adds five to a…and b temporarily since they are call by value arguments.…
The function header, or the function signature, has a…return type of void, it does not return anything.…The name of the function, addfive, and the two values,…
- Downloading and exploring the C++ IDE
- Working with loops
- Using predefined functions
- Creating custom functions
- Creating and instantiating classes
- Working with external files
Skill Level Beginner
1. Getting Started
2. C++ Basics
3. Flow of Control
4. Classes and Objects
5. Data Structures
6. File Manipulation
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