IN C++

PLEASE MAKE IT IN 3 FILES IN MAIN .CPP, PIZZA.H & PIZZA.CPP Joe's Pizza Palace needs a program to calculate the number of slices a pizza of any size can be divided into. The program should perform the following steps: A) Ask the user for the diameter of the pizza in inches. B) Calculate the number of slices that may be taken from a pizza of that size. C) Display a message telling the number of slices. To calculate the number of slices that may be taken from the pizza, you must know the following facts: Each slice should have an area of 14.125 inches. To calculate the number of slices, simply divide the area of the pizza by 14.125. The area of the pizza is calculated with this formula: Area p r 2 to. Define the class Pizza with an attribute of type pointer to the diameter d. Add a Copy Constructor member function e. Add the this pointer, to return the values contained in the attributes of the class and the invocation of its member functions. f.. Implement the cascading effect with the this pointer. Show it on the show principal. and. Validate the diameter that is positive (try/Catch) and create the NegativeDiameter class to send the validation message.