A destructor works opposite to constructor; it destructs the objects of classes. It can be defined only once in a class. Like constructors, it is invoked automatically.
A destructor is defined like constructor. It must have same name as class. But it is prefixed with a tilde sign (~).
Note: C++ destructor cannot have parameters. Moreover, modifiers can't be applied on destructors.
C++ Constructor and Destructor Example
Let's see an example of constructor and destructor in C++ which is called automatically.