Constructors amp Destructors in C Programming Object Oriented Programming Concepts

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Support Simple Snippets by Donations - • Google Pay UPI ID - tanmaysakpal11@okicici • PayPal - paypal.me/tanmaysakpal11 • --------------------------------------------------------------------------------------------- 1. What is a Constructor? • A constructor is a member function of a class which initializes objects of a class. In C++, Constructor is automatically called when object(instance of class) is created. It is special member function of the class. • 2. How constructors are different from a normal member function? • A constructor is different from normal functions in following ways: • Constructor has same name as the class itself • Constructors don’t have return type • A constructor is automatically called when an object is created. • If we do not specify a constructor, C++ compiler generates a default constructor for us (expects no parameters and has an empty body). • Types of Constructors? • Default Constructors: Default constructor is the constructor which doesn’t take any argument. It has no parameters. • Parameterized Constructors: It is possible to pass arguments to constructors. Typically, these arguments help initialize an object when it is created. To create a parameterized constructor, simply add parameters to it the way you would to any other function. When you define the constructor’s body, use the parameters to initialize the object. • Copy Constructor: A copy constructor is a member function which initializes an object using another object of the same class. • What is Destructor? • Destructor is a member function which destructs or deletes an object. • When is destructor called? • The function ends. • The program ends. • A block containing local variables ends. • A delete operator is called. • How destructors are different from a normal member function? • Destructors have same name as the class preceded by a tilde (~). • Destructors don’t take any argument and don’t return anything(not even void). • Can there be more than one destructor in a class? • No, there can only one destructor in a class with classname preceded by ~, no parameters and no return type. • When do we need to write a user-defined destructor? • If we do not write our own destructor in class, compiler creates a default destructor for us. The default destructor works fine unless we have dynamically allocated memory or pointer in class. When a class contains a pointer to memory allocated in class, we should write a destructor to release memory before the class instance is destroyed. This must be done to avoid memory leak. • Constructors Destructors in C++ Theory Article - https://simplesnippets.tech/construct... • Download Dev C++ IDE : https://sourceforge.net/projects/orwe... • Download C++ Android App : https://play.google.com/store/apps/de... • Simple Snippets Official Website - • https://simplesnippets.tech/ • Simple Snippets on Facebook- • / simplesnippets • Simple Snippets on Instagram- • / simplesnipp. . • Simple Snippets Google Plus Page- • https://plus.google.com/+SimpleSnippets • Simple Snippets email ID- • [email protected] • For Classroom Coaching in Mumbai for Programming other IT/CS Subjects Checkout UpSkill Infotech - https://upskill.tech/ • UpSkill is an Ed-Tech Company / Coaching Centre for Information Technology / Computer Science oriented courses and offer coacing for various Degree courses like BSc.IT, BSc.CS, BCA, MSc.IT, MSc.CS, MCA etc. • Contact via email /call / FB /Whatsapp for more info • email - [email protected] • We also Provide Certification courses like - • Android Development • Web Development • Java Developer Course • .NET Developer Course

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