kord posted

what is own assignment operator in C++ ?

what is own assignment operator in C++? How to use it?

css-learner
answered May 1 '23 00:00

C++ provides the assignment operator = to assign a value to a variable . By default, the assignment operator performs a shallow copy of the values from one object to another. However, in certain situations, you may need to define your own assignment operator to customize the behavior or perform a deep copy.

To define your own assignment operator in C++, you can follow this syntax:


class MyClass {
public:
    // Default constructor
    MyClass() {
        // constructor code here
    }

    // Copy constructor
    MyClass(const MyClass& other) {
        // copy constructor code here
    }

    // Assignment operator
    MyClass& operator=(const MyClass& other) {
        if (this != &other) { // check for self-assignment
            // assignment code here
        }
        return *this;
    }

    // Destructor
    ~MyClass() {
        // destructor code here
    }

    // Other member functions and variables
};

In this example, the MyClass class is defined with a default constructor, copy constructor, assignment operator, and destructor. The assignment operator takes a const reference to another MyClass object as a parameter, and returns a reference to the current object.

To avoid deleting data and invalidating pointers, the assignment operator checks for self-assignment using the comparison operator !=. You can customize the behavior of the assignment operator by adding any necessary copying or other operations.

It's important to note that in most cases, the default assignment operator provided by the compiler should suffice, and defining your own assignment operator is only necessary when customizing behavior or performing a deep copy.

Edit Answer

kord posted

what is own assignment operator in C++ ?

css-learner answered May 1 '23 00:00

Related Questions

Insert link

Insert image

css-learner
answered May 1 '23 00:00