## CS 1401, Quiz 13

**Date:** Tuesday, April 24, 2007

**Name** (please type legibly, ideally in block letters):
______________________________________________________________________

**Class section** (9:00 am or 10:30 am):_______________________________
1. Suppose that in a program, at some point, we compute the
percentage of female students in a CS class as follows:

percentage = female / (female + male);

where all three variables *percentage*, *female*, and
*male* are of integer type. In this code, if we accidentally left
both *male* and *female* to be 0, the program will interrupt
its computations and produce a (not necessarily clear) error message.
Modify this part of your program in such a way that if both values are
zeros (i.e., if the program attempts to divide by 0), it will produce
a meaningful error message which will be very clear to the user.

2. If the variables *male* and *female* are
of type double, then there will be no interruption,
division of 0 by 0 will return NaN (not a number). Modify your exceptions code
from Problem 1 in such a way that your program will produce a meaningful
error message for variables of type double.