Constructors and destructors are special member functions of a class that are automatically called when an object is created or destroyed, respectively.

Constructor: Initializes the object's data members and can perform other setup tasks. Constructors have the same name as the class and do not have a return type.
Destructor: Releases any resources allocated by the object and performs other cleanup tasks. Destructors have the same name as the class, preceded by a tilde (~), and do not have a return type.

For example:

class MyClass {
public:
  MyClass() { // constructor
    // initialization code
  }

  ~MyClass() { // destructor
    // cleanup code
  }
};