I have learned c++ 3 years ago and i forgot a lot of things about it.somehow my brother ask me about c++ and i don't want to disappoint him...so i need helps from you.
the question look like this :


Write a program that will print the letter grade after given the marks that student earned in the
final exam. You’ll have to input an integer and print the letter grade as following -
80-100 A
60-79 B
50-59 C
0-49 F