How do I initialize a copy in C++?

How do I initialize a copy in C++?

In C++, you can initialize a copy using the copy constructor. For example, if you have a class MyClass, you can do this: MyClass obj2 = obj1; where obj1 is an existing object.

What if I want to use a copy assignment operator instead?

You can use the copy assignment operator like this: obj2 = obj1;. This will copy the values from obj1 to obj2 after obj2 has already been initialized.

Are there any differences between the copy constructor and the copy assignment operator?

Yes, the copy constructor initializes a new object, while the copy assignment operator assigns values to an already existing object.

Can you give me an example of a class with both?

Sure! Here's a simple example:

class MyClass {
public:
    int value;
    MyClass(int v) : value(v) {} // Constructor
    MyClass(const MyClass &obj) : value(obj.value) {} // Copy Constructor
    MyClass& operator=(const MyClass &obj) { // Copy Assignment
        if (this != &obj) {
            value = obj.value;
        }
        return *this;
    }
};