How do I write constructors, destructors, and assignment operators in C++?

In C++, constructors, destructors, and assignment operators are special member functions that play essential roles in resource management and object lifecycle. Here's a brief overview along with examples of how to implement them.

Constructors

A constructor is a special member function that is called when an object of a class is instantiated. Its primary purpose is to initialize the object's properties.

Destructors

A destructor is called when an object goes out of scope or is explicitly deleted. It is used to free resources that the object may have acquired during its lifetime.

Assignment Operators

The assignment operator is used to copy the values from one object to another. If you do not define your own assignment operator, the compiler provides a default one.

Example


    class Example {
        int *data;
    public:
        // Constructor
        Example(int value) {
            data = new int(value);
        }

        // Copy Constructor
        Example(const Example &other) {
            data = new int(*(other.data));
        }

        // Destructor
        ~Example() {
            delete data;
        }

        // Assignment Operator
        Example& operator=(const Example &other) {
            if (this != &other) {
                delete data; // Free existing resource
                data = new int(*(other.data)); // Allocate new resource
            }
            return *this;
        }

        int getValue() const {
            return *data;
        }
    };

How do I write constructors, destructors, and assignment operators in C++?

Constructors

Destructors

Assignment Operators

Example

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How do I write constructors, destructors, and assignment operators in C++?

Constructors

Destructors

Assignment Operators

Example

Related Questions

Popular Topics

Recent Languages