Create two classes. The first, named Sale, holds data for a sales transaction. Its private
data members include the day of the month, amount of the sale, and the salesperson’s
ID number. The second class, named Salesperson, holds data for a salesperson, and
its private data members include each salesperson’s ID number and last name. Each
class includes a constructor to which you can pass the field values. Create a friend
function named display()that is a friend of both classes and displays the date of
sale, the amount, and the salesperson ID and name. Write a short main()demonstration
program to test your classes and friend function. Save the file as Sales.cpp.
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