CS 55  Java Programming

Agenda

• Chapter 4 - Control Structures: Part 1
• Test 1 (see Week 3 Web page for test 1 information)

Examples

References

Lab04

The best way to code the following exercises is to use a  while loop with an end-of-data sentinel. See the lecture notes for the syntax and semantics of the while statement. See  BasicStatements.java  for an example of a while loop with an end-of-data sentinel.

1. Exercise 4.11  Drivers are concerned with the mileage their automobiles get. One driver has kept track of several tankfuls of gasoline by recording miles driven and gallons used for each tankful. Develop a Java application that will input the miles driven and gallons used for each tankful. The program should calculate and display the miles per gallon obtained for each tankful and print the combined miles per gallon obtained for all tankfuls up to this point. All averaging calculations should produce floating-point results. Use input dialogs to obtain the data from the user. Use a while statement to repeat the calculations for each tankful. Use an end-of-data sentinel to terminate the loop.
• classname: Gas
2. Exercise 4.12  Develop a Java application that will determine whether a department-store customer has exceeded the credit limit on a charge account. For each customer, the following facts are available:
       a)  account number
       b)  balance at the beginning of the month
       c)  total of all items charged by the customer this month
       d)  total of all credits applied to the customer's account this month
       e)  allowed credit limit
   The program should input each of these facts from input dialogs, calculate the new balance (balance <- balance + charges - credits), display the new balance, and determine whether the new balance exceeds the customer's credit limit. For those customers whose credit limit is exceeded, the program should display the message "Credit limit exceeded." Use a while statement to repeat the calculations for each customer. Use an end-of-data sentinel to terminate the loop.
• classname: CreditChecker