Please use structure programming with functions and pointers

displays all t s) ces of 3. A Booksellers has a book club that awards points to its customers based on the number of books purchased each month. The points are awarded as follows: . If a customer purchases 1 book, he or she earns 5 points. If a customer purchases 2 books, he or she earns 15 points. . If a customer purchases 3 books, he or she earns 30 points. If a customer purchases 4 books, he or she earns 60 points. Write a program that asks the user to enter the number of books that a customer purchased this month, then displays the number of points awarded