Java Reference
In-Depth Information
**3.15
(
Game: lottery
) Revise Listing 3.8, Lottery.java, to generate a lottery of a three-
digit number. The program prompts the user to enter a three-digit number and
determines whether the user wins according to the following rules:
1. If the user input matches the lottery number in the exact order, the award is
$10,000.
2. If all digits in the user input match all digits in the lottery number, the award is
$3,000.
3. If one digit in the user input matches a digit in the lottery number, the award is
$1,000.
3.16
(
Random point
) Write a program that displays a random coordinate in a rectangle.
The rectangle is centered at (0, 0) with width 100 and height 200.
*3.17
(
Game: scissor, rock, paper
) Write a program that plays the popular scissor-rock-
paper game. (A scissor can cut a paper, a rock can knock a scissor, and a paper can
wrap a rock.) The program randomly generates a number
0
,
1
, or
2
representing
scissor, rock, and paper. The program prompts the user to enter a number
0
,
1
, or
2
and displays a message indicating whether the user or the computer wins, loses,
or draws. Here are sample runs:
scissor (0), rock (1), paper (2): 1
The computer is scissor. You are rock. You won
scissor (0), rock (1), paper (2): 2
The computer is paper. You are paper too. It is a draw
*3.18
(
Cost of shipping
) A shipping company uses the following function to calcu-
late the cost (in dollars) of shipping based on the weight of the package (in
pounds).
d
3.5, if 0
6
w
6 =
1
5.5, if 1
6
w
6 =
3
=
c
(
w
)
6
6 =
8.5, if 3
w
10
6
6 =
10.5, if 10
w
20
Write a program that prompts the user to enter the weight of the package and
display the shipping cost. If the weight is greater than 50, display a message “the
package cannot be shipped.”
**3.19
(
Compute the perimeter of a triangle
) Write a program that reads three edges for
a triangle and computes the perimeter if the input is valid. Otherwise, display that
the input is invalid. The input is valid if the sum of every pair of two edges is
greater than the remaining edge.
*3.20
(
Science: wind-chill temperature
) Programming Exercise 2.17 gives a formula
to compute the wind-chill temperature. The formula is valid for temperatures in
the range between −58ºF and 41ºF and wind speed greater than or equal to
2
.
Write a program that prompts the user to enter a temperature and a wind speed.
The program displays the wind-chill temperature if the input is valid; otherwise,
it displays a message indicating whether the temperature and/or wind speed is
invalid.
Search WWH ::
Custom Search