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This week we have a few more posts about Default Constructors; we will keep diving into Classes & Objects in the coming weeks. We show how to download and set up popular Embarcadero C++ IDE easily. For professionals, we have two CppCon Videos that we pick. As we mentioned before, one of the most powerful features of C++ is Object-Oriented Programming (OOP), which makes it different from the C programming language by using Classes, Objects, and more. Object-Oriented Programming has many advantages over procedural programming and it is the most characteristic feature of the C++ programming language.
Table of Contents
Let’s Learn About C++ Constructors
The constructor in C++ is a function, a method in the class, but it is a ‘special method’ that is automatically called when an object of a class is created. We don’t need to call this function. Whenever a new object of a class is created, the constructor allows the class to initialize member variables or allocate storage. This is why the name Constructor is given to this special method.
If we dive into Constructors subject, there are different contractor types
- Default Constructor (Last week and this week’s peeks are about these)
- Copy Constructor
- Move Constructor (since C++11)
- Copy Assignment operator
- Move Assignment operator (since C++11)
Most of these methods is not only used in classes but also used with struct and union data types, and the Default Constructor in classes is one of these.
What is Default Constructor?
A Default Constructor in C++ is a constructor type in Classes that is called when class is defined with no arguments. It can also be defined with an empty parameter list, or with default arguments provided for every parameter. A type with a public default constructor is Default Constructible;
This week we answer the following questions on the LearnCPlusPlus.org website:
- What is Implicitly Declared Default Constructor?
- What means Deleted Implicitly Declared Default Constructor?
- What is Trivial Default Constructor?
- How can we set up Dev-C++?
How Can I Learn About Constructors in C++?
Last week we released The Ultimate Guide to C++ Constructors which was Part I
LearnCPlusPlus.org has a lot of posts about constructors with examples, Here are some of picks
- Learn Implicitly Declared Default Constructor in C++
- Learn to use Deleted Implicitly-Declared Default Constructor in C++
- Learn what is Trivial Default Constructor in C++
- How To Set Up Dev-C++ For Your First Project
Learn C++ With Not Leaving Performance On The Jump Table by Eduardo Madrid (CPPCon 2020) Video
- Learn C++ With No Touchy! A Case Study of Software Architecture with Immutable Objects by Borislav Stanimirov (CPPCon 2020) Video
- Learn C++ With Not Leaving Performance On The Jump Table by Eduardo Madrid (CPPCon 2020) Video
We will continue to OOP with Copy Constructors in C++ this week. Please keep following our LearnCPlusPlus.org website for the latest posts and updates. Feel free to comment and share with your colleagues, students, members – knowledge is power, and knowledge shared is empowering.
C++ Builder is the easiest and fastest C and C++ IDE for building simple or professional applications on the Windows, MacOS, iOS & Android operating systems. There is a free C++ Builder Community Edition for students, beginners, and startups; it can be downloaded from here. For professional developers, we have Professional, Architect, or Enterprise versions of C++ Builder and there is a trial version you can download from here.