Java Reference
In-Depth Information
public static void
traceMe(
double
x,
double
y)
{
double
z;
if
(x != 0)
z = Math.sqrt(y) / x;
else
{
System.out.print("Enter a nonzero number: ");
x = console.nextDouble();
System.out.println();
z = Math.floor(Math.pow(y, x));
}
System.out.printf("%.2f, %.2f, %.2f, %n", x, y, z);
}
}
a.
What is the output if the input is
3 625
?
b.
What is the output if the input is
24 1024
?
c.
What is the output if the input is
0 196
?
29.
In Exercise 28, determine the scope of each identifier.
30.
Write the definition of a void method that takes as input a decimal number
and outputs 3 times the value of the decimal number. Format your output
to two decimal places.
31.
Write the definition of a void method that takes as input two decimal
numbers. If the first number is nonzero, it outputs the second number
divided by the first number; otherwise, it outputs a message indicating that
the second number cannot be divided by the first number because the first
number is 0.
32.
Write the definition of a method that takes as input two parameters of type
int
, say
sum
and
testScore
. The method updates the value of
sum
by
adding the value of
testScore
, and then returns the updated value of
sum
.
1.
Write a value-returning method,
isVowel
, that returns the value
true
if a
given character is a vowel, and otherwise returns
false
. Also write a
program to test your method.
2.
Write a program that prompts the user to input a sequence of characters
and outputs the number of vowels. (Use the method
isVowel
written in
Programming Exercise 1.)
3.
Write a program that uses the method
sqrt
of the
class
Math
and outputs
the square roots of the first 25 positive integers. (Your program must output
each number and its square root.)
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