Java Reference
In-Depth Information
should roll the dice 36,000,000 times. Use a one-dimensional array to tally the number of times
each possible sum appears. Display the results in tabular format.
1
2
3
4
5
6
1
2
3
4
5
6
7
2
3
4
5
6
7
8
3
4
5
6
4
5
6
7
5
6
7
8
6
7
8
9
7
8
9
10
8
9
10
11
9
10
11
12
Fig. 7.28
|
The 36 possible sums of two dice.
7.18
(Game of Craps)
Write an application that runs 1,000,000 games of craps (Fig. 6.8) and
answers the following questions:
a) How many games are won on the first roll, second roll, …, twentieth roll and after the
twentieth roll?
b) How many games are lost on the first roll, second roll, …, twentieth roll and after the
twentieth roll?
c) What are the chances of winning at craps? [
Note:
You should discover that craps is one
of the fairest casino games. What do you suppose this means?]
d) What is the average length of a game of craps?
e) Do the chances of winning improve with the length of the game?
7.19
(Airline Reservations System)
A small airline has just purchased a computer for its new au-
tomated reservations system. You've been asked to develop the new system. You're to write an ap-
plication to assign seats on each flight of the airline's only plane (capacity: 10 seats).
Your application should display the following alternatives:
Please
type
1
for
First
Class
and
Please
type
2
for
Economy
. If the user types
1
, your application should assign a seat in the first-
class section (seats 1-5). If the user types
2
, your application should assign a seat in the economy
section (seats 6-10). Your application should then display a boarding pass indicating the person's
seat number and whether it's in the first-class or economy section of the plane.
Use a one-dimensional array of primitive type
boolean
to represent the seating chart of the
plane. Initialize all the elements of the array to
false
to indicate that all the seats are empty. As
each seat is assigned, set the corresponding element of the array to
true
to indicate that the seat is
no longer available.
Your application should never assign a seat that has already been assigned. When the economy
section is full, your application should ask the person if it's acceptable to be placed in the first-class
section (and vice versa). If yes, make the appropriate seat assignment. If no, display the message
"Next
flight
leaves
in
3
hours."
7.20
(Total Sales)
Use a two-dimensional array to solve the following problem: A company has
four salespeople (1 to 4) who sell five different products (1 to 5). Once a day, each salesperson passes
in a slip for each type of product sold. Each slip contains the following:
a) The salesperson number
b) The product number
c) The total dollar value of that product sold that day
Thus, each salesperson passes in between 0 and 5 sales slips per day. Assume that the information
from all the slips for last month is available. Write an application that will read all this information for
