Java Reference
In-Depth Information
2.18
(
Print a table
) Write a program that displays the following table:
a b pow(a, b)
1 2 1
2 3 8
3 4 81
4 5 1024
5 6 15625
2.19
(
Geometry: distance of two points
) Write a program that prompts the user to enter
two points
(x1, y1)
and
(x2, y2)
and di
splays their distance betw
een them.
The formula for computing the distance is
x
1
)
2
y
1
)
2
.
2
(
x
2
-
+
(
y
2
-
Note that
you can use
Math.pow(a, 0.5)
to compute
2
a
.
Here is a sample run:
Enter x1 and y1:
Enter x2 and y2:
The distance between the two points is 8.764131445842194
1.5 -3.4
4 5
Sections 2.13-2.16
*2.20
(
Financial application: calculate interest
) If you know the balance and the annual
percentage interest rate, you can compute the interest on the next monthly pay-
ment using the following formula:
interest
=
balance
*
(annualInterestRate / 1200)
Write a program that reads the balance and the annual percentage interest rate and
displays the interest for the next month. Here is a sample run:
Enter balance and interest rate (e.g., 3 for 3%):
The interest is 2.91667
1000 3.5
*2.21
(
Financial application: calculate future investment value
) Write a program that
reads in investment amount, annual interest rate, and number of years, and dis-
plays the future investment value using the following formula:
futureInvestmentValue =
investmentAmount x (1 + monthlyInterestRate)
numberOfYears*12
For example, if you enter amount
1000
, annual interest rate
3.25%
, and number of
years
1
, the future investment value is
1032.98
.
Here is a sample run:
Enter investment amount:
Enter annual interest rate in percentage:
Enter number of years:
Accumulated value is $1043.34
1000
4.25
1
