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Category: OOP with C++

Associations, Aggregation & Composition in OOP (C++)

Associations, Aggregation & Composition in OOP (C++)

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Object-Oriented Programming is not only about creating classes and objects, it is also about how objects interact with each other. In the real world, nothing exists in isolation: a teacher teaches a subject, a car has an engine, a university contains departments. OOP represent these real-world relationships using: Association, Aggregation, and Composition. Before we begin, remember the fundamental difference: This tutorial explains “has-a” relationships clearly using real-world analogies and simple C++ programs. Association Association represents a general relationship between two…

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Composition and Aggregation in C++

Composition and Aggregation in C++

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In Object-Oriented Programming (OOP), Composition and Aggregation describe relationships between classes, specifically how objects are associated with one another. Both are forms of the “has-a” relationship, but they differ in strength and dependency. So in this article we will see the concept of Composition and Aggregation in C++ and also check the difference between Composition and Aggregation. What is Composition? Composition represents a strong relationship between two classes. It is used when an object (child) is a part of another…

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Difference between Method/Function Overloading and Overriding (Polymorphism) in C++

Difference between Method/Function Overloading and Overriding (Polymorphism) in C++

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Polymorphism is one of the most powerful and essential concepts of Object-Oriented Programming (OOP). It refers to the ability of a single function, method, or object to behave in different ways depending on the context in which it is used. The term “Polymorphism” is derived from the Greek words poly (many) and morphe (forms), meaning “many forms.” Polymorphism allows you to write flexible, reusable, and maintainable code by enabling a single function or method to process different types of objects….

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Operator Overloading in C++

Operator Overloading in C++

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Operator Overloading: In C++, operator overloading allows you to define custom behavior for operators (such as +, -, *, ==, etc.) when they are applied to user-defined types (i.e., objects of classes). This feature enables the creation of expressive and intuitive code, as it allows operators to work with objects in a way that mimics their behavior with built-in types. Operator overloading is a powerful mechanism that enhances the expressiveness of object-oriented code by enabling objects to interact using operators…

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Understanding Function Overloading in C++

Understanding Function Overloading in C++

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Introduction: Function overloading is a powerful feature in C++ that allows multiple functions with the same name to exist in the same scope, provided their parameter lists are different. This feature is a part of polymorphism in Object-Oriented Programming (OOP) and allows developers to implement functions that perform similar tasks but operate on different types or numbers of inputs. What is Function Overloading? Function overloading occurs when: Advantages of Function Overloading: Example Code: Function Overloading in C++ Below is an…

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Static Data Members and Functions in C++

Static Data Members and Functions in C++

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In daily life, some things are shared by everyone rather than belonging to just one person. For example, in a classroom the notice board is the same for all students. If one student puts a notice, every student can see it. Similarly, in a society, the water tank is shared by all houses. In C++, such shared values or functions are handled using the static keyword. A static member in C++ belongs to the class itself rather than to individual…

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Understanding const Data Members and Functions in C++

Understanding const Data Members and Functions in C++

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In object-oriented programming, we design classes as blueprints for creating objects. A class itself does not store data; it only defines the structure and behavior that objects will have. The actual data is stored in the memory allocated to each object when it is created. While designing software systems, we often encounter values that must not change during program execution. Mathematical constants such as π, configuration limits, fixed rates, and identification codes are examples of such values. If these values…

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Constructors and Destructors in C++

Constructors and Destructors in C++

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C++ gives every object a clear life story: it’s created, used, and then destroyed. To make this safe and predictable, the language runs a special function at birth (to initialize the object) and another at death (to clean up resources). Constructors in C++ Constructors exist to prevent uninitialized state, to let callers pass meaningful values at creation time, and to centralize setup logic in one place. In practice, you’ll use two common kinds; You may define multiple constructors for the…

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Understanding Access Modifiers in C++

Understanding Access Modifiers in C++

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What Are Access Modifiers? In C++, access modifiers are keywords used to define the level of access that members of a class (variables and methods) can have. They are essential for ensuring encapsulation, which is a core concept of Object-Oriented Programming (OOP). By using access modifiers, we control how the internal data of a class is accessed, modified, and protected. Access modifiers in C++ include: By controlling access, access modifiers help: Types of Access Modifiers Code Example class number {…

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Understanding Destructors In C++ (OOP)

Understanding Destructors In C++ (OOP)

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In object-oriented programming, every object has a life cycle. It is created, it performs certain tasks, and eventually it is destroyed. While much attention is given to how objects are created using constructors, equal importance must be given to how objects are destroyed. In C++, the destruction of an object is handled by a special member function called the destructor. A destructor ensures that when an object completes its purpose, the resources associated with it are released in a controlled…

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