this, is a special keyword and pointer. It points to the very object is it in… you may think of it as self-referencing to it’s own object.
This is important in case a class method has a parameter name with the same name as a class property. If the keyword this is not used, then it will use the parameter.
Circle::Circle(double radius)
{
this->radius = radius;
}The This Object Reference was originally found on Access 2 Learn
Assistant Professor
Walter Wimberly is an Assistant Professor at a regional college in Tennessee, teaching Computer Science in the Software Engineering track. He works as a student advisor, oversees curriculum changes, develops new courses, and manages the advisory panel.
Walter taught full time for about 7 years, before going back into “industry” as a full stack Software Developer for a dozen years. There he focused on web based projects coding in JavaScript/jQuery and utilizing the Bootstrap CSS Framework on the front-end, and coding in PHP, ASP/ASP.Net, SQL on the back-end.
Since he loves teaching, he taught as an adjunct web and digital media classes for eight (8) years, while working in industry, and has since returned to teaching full time.
He has been married for over 25 years, and is father to several special needs boys. As such, he is working on some projects to help others who have special needs to be self-sufficient, and support the care givers of those with special needs. Check out his Autism blog for more info.
Let’s look at a simple program and work through it step by step. #include #include statements are at the top of the file, and let you include any libraries you might need. iostream, in our example is used to help process input and output. You might think this is standard, but if you are building…
Traditional procedural programming focuses on actions – functions. Object oriented programming focuses on data (objects) and the operations on objects. You want to look at items that you will be coding, and think, what makes this information up? and, What things can it do, and/or be done to it? Objects in the physical realm are…
Let’s walk through the steps to create a simple C++ program that will calculate a circle’s area using the formula area = pi x r2 First we’ll set up our preprocessor directives, and an empty main function. Next we will need to define variables that will be used by the program. In C/C++ we must…
We’ve seen the benefits of passing variables by reference to a function. It allows you to change their value inside the function. Well, when we pass by reference, this is essentially using pointers – you just didn’t realize it. Therefore you can have instances like: Alternatively I can write it with passing the memory address…
Let’s look a little closer at constructors than we did in our initial Defining Classes for Objects example. Anytime you create an object, a constructor is called. If you overload your constructor, C++ will pick the right constructor to call, just like it does when you overload a function. Constructors must have the same name…
Because an array is used to store a collection of data, it is important to know how to use them efficiently. Searching Arrays We often need to search an array to see if a value is inside of it or not. While some languages do this for you, C++, because of it’s age, doesn’t. Linear…
