What are default constructors in C++?

What are default constructors in C++?

Default constructors are special constructors that can be called without any arguments. They initialize objects with default values.

Can you give me an example of a default constructor?

Sure! Here's a simple example:

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

This constructor is called when an object of MyClass is created without any parameters.

What happens if I don't define a default constructor?

If you don't define a default constructor and your class has no other constructors, the compiler provides a default one. However, if you define any constructor with parameters, the default constructor won't be generated automatically.

Are there any specific use cases for default constructors?

Yes, default constructors are useful for initializing objects in collections, creating objects with default states, and when you need to create an array of objects.