Create a class Car, which contains Three data members i. e. carName (of string type), ignition (of bool type), and currentSpeed (of integer type)  A no-argument constructor to initialize all data members with default values
 A parameterized constructor to initialize all data members with user-defined values
 Three setter functions to set values for all data members individually
 Three getter function to get value of all data members individually
 A member function setSpeed( ) // takes integer argument for setting speed
Derive a class named Convertible that contains
 A data member top (of Boolean type)
 A no-argument constructor to assign default value as “false” to top
 A four argument constructor to assign values to all data-members i. e. carName, ignition, currentSpeed and top.
 A setter to set the top data member up
 A function named show() that displays all data member values of invoking object
Write a main() function that instantiates objects of Convertible class and test the functionality of all its member functions.