In C++, what is the main purpose of constructors?

The main purpose of constructors in C++ is to initialize objects of a class. When an object of a class is created, the constructor is automatically called, allowing for any necessary setup or initial state configuration specific to that object. This can include setting default values for member variables, allocating resources, or performing any prerequisite steps needed before the object can be used effectively.

Constructors can also take parameters, which allows for custom initialization based on the specific needs of the object being created. This feature provides flexibility and ensures that objects are in a valid state immediately upon creation, which is crucial for maintaining the integrity of the data it encapsulates.

While other options relate to important concepts in C++, they do not pertain directly to the primary function of constructors. For instance, destructors are responsible for cleaning up resources, not constructors; dynamic memory allocation is handled by other mechanisms in conjunction with constructors; and operator overloading is a separate feature that allows developers to define how operators behave for user-defined types.