1. Consider the previous question, but include + or − letter grades. O + is 5.25,
O− is 4.75, E + is 4.25, E − is 3.75, and so on.
a. Why can’t we use one switch statement with no other conditionals to
convert these additional letter grades?
b. Write a fragment of code that will do the conversion using a multibranch
if-else statement.
c. Write a fragment of code that will do the conversion using nested switch
statements.
2. Imagine a program that displays a menu of five possible choices, lettered
a
through
e. S uppose the user’s selection is read into the character variable
choice. Write a switch statement that reacts to this choice by displaying
a message that indicates the choice. Display an error message if the user
makes an invalid choice.