Chapter 8, Problem 3PP

(Data processing) Write a C++ program that allows the user to enter the following information from the keyboard for each student in a class (up to 20 students):

Name Exam 1 Grade Exam 2 Grade Homework Grade Final Exam Grade

For each student, your program should first calculate a final grade, using this formula:

$FinalGrade=0.20\times Exam1+0.20\times Exam2+0.35\times Homework+0.25\times FinalExam$ Then assign a letter grade on the basis of $90–100=A,80–89=B,70–79=C,60–69=D,$ and less than $60=F$ . All the information, including the final grade and the letter grade, should then be displayed and written to a file.