Chapter 3, Problem 12E

Consider the previous question, but include + or – letter grades. A+ is 4.25, A– is 3.75, B+ is 3.25. B– is 2.75, and so on.

1. a. Why can’t we use one switch statement with no other conditionals to convert these additional letter grades?
2. b. Write a fragment of code that will do the conversion using a multibranch if-also statement.
3. c. Write a fragment of code that will do the conversion using nested switch statements.