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Tukewl4u
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 Posted: Sat Oct 14, 2006 7:11 am Post subject: Math.Floor |
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Can someone direct me in the right direction on this? I just don't
understand what it's asking.
An Application of method.floor is rounding a value to the nearest integer.
The statement y = math.floor( x + 0.5 ); will round the number x to the
nearest integer and assign the result to y. Write an application that reads
double value and uses the preceding statement to round each of the numbers
to the nearest integer. For each number proceeded, display both the original
number and rounded number. |
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Hal Rosser
Guest
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| Posted: Sat Oct 14, 2006 7:11 am Post subject: Re: Math.Floor |
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"Tukewl4u" <TuKool4u (AT) hotmail (DOT) com> wrote in message
news:Gfadnf1i4cM3wa3YnZ2dnUVZ_r2dnZ2d (AT) entouch (DOT) net...
| Quote: | Can someone direct me in the right direction on this? I just don't
understand what it's asking.
An Application of method.floor is rounding a value to the nearest integer.
The statement y = math.floor( x + 0.5 ); will round the number x to the
nearest integer and assign the result to y. Write an application that
reads double value and uses the preceding statement to round each of the
numbers to the nearest integer. For each number proceeded, display both
the original number and rounded number.
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Math.floor(...) does not round, to nearest int - it rounds **down**
Math.Ceil(...) rounds up
Math.round(...) may be what you're looking for - it rounds to nearest int.
... for more on the Math class reference your friendly neighborhood Java API |
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Andrew Thompson
Guest
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| Posted: Sat Oct 14, 2006 7:11 am Post subject: Re: Math.Floor |
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Tukewl4u wrote:
| Quote: | Can someone direct me in the right direction on this?
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'1 group' would be the right direction for this question.
Please refrain from multi-posting in future.
And as an aside, I have noticed a lot* of multi-posters
sending posts to c.l.j.programmer & help as well as
it.comp.java.
Is there some Italian web page or usenet portal or 'authority'
that is suggesting that multi-posting to 3 groups is a good idea?
(I must beat them with a big stick.)
* At least three instances, in the past 2 weeks.
(Note: X-post to c.l.j.p./c.l.j.h./i.c.j., w/ f-u to c.l.j.help only)
Andrew T. |
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Tor Iver Wilhelmsen
Guest
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| Posted: Sat Oct 14, 2006 2:03 pm Post subject: Re: Math.Floor |
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"Hal Rosser" <hmrosser (AT) bellsouth (DOT) net> writes:
| Quote: | Math.floor(...) does not round, to nearest int - it rounds **down**
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That's true for Math.floor(x), but not Math.floor(x + 0.5) as in the
example. In fact, the Javadocs for Math.round() says the method is
equal to (long)Math.floor(a + 0.5d) |
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Tukewl4u
Guest
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| Posted: Sat Oct 14, 2006 9:10 pm Post subject: Re: Math.Floor |
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But my example says Math.floor...how can I use this statement a round?
import java.util.Scanner;
public class MaximumFinder
{
public void determineMaximum()
{
Scanner input = new Scanner( System.in );
System.out.print("Enter three values seperated by spaces: ");
double number1 = input.nextDouble();
double number2 = input.nextDouble();
double number3 = input.nextDouble();
double result = maximum( number1, number2, number3 );
System.out.println( "Maximum is : " + result);
}
public double maximum ( double x, double y, double z)
{
double maximumValue = Math.floor( x + 0.5);
if ( y > maximumValue )
maximumValue = y;
if ( z > maximumValue )
maximumValue = z;
return maximumValue;
}
}
"Tor Iver Wilhelmsen" <jadedgamer (AT) hotmail (DOT) com> wrote in message
news:uk633nuaw.fsf (AT) hotmail (DOT) com...
| Quote: | "Hal Rosser" <hmrosser (AT) bellsouth (DOT) net> writes:
Math.floor(...) does not round, to nearest int - it rounds **down**
That's true for Math.floor(x), but not Math.floor(x + 0.5) as in the
example. In fact, the Javadocs for Math.round() says the method is
equal to (long)Math.floor(a + 0.5d)
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Hal Rosser
Guest
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| Posted: Sun Oct 15, 2006 3:54 am Post subject: Re: Math.Floor |
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| Quote: |
Math.floor(...) does not round, to nearest int - it rounds **down**
That's true for Math.floor(x), but not Math.floor(x + 0.5) as in the
example. In fact, the Javadocs for Math.round() says the method is
equal to (long)Math.floor(a + 0.5d)
|
ooooh! - he's rounding x , not rounding (the number in parenthesis) - ok |
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Jeff
Guest
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| Posted: Mon Oct 16, 2006 4:20 pm Post subject: Re: Math.Floor |
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Tukewl4u wrote:
| Quote: | But my example says Math.floor...how can I use this statement a round?
import java.util.Scanner;
public class MaximumFinder
{
public void determineMaximum()
{
Scanner input = new Scanner( System.in );
System.out.print("Enter three values seperated by spaces: ");
double number1 = input.nextDouble();
double number2 = input.nextDouble();
double number3 = input.nextDouble();
double result = maximum( number1, number2, number3 );
System.out.println( "Maximum is : " + result);
}
public double maximum ( double x, double y, double z)
{
double maximumValue = Math.floor( x + 0.5);
if ( y > maximumValue )
maximumValue = y;
if ( z > maximumValue )
maximumValue = z;
return maximumValue;
}
}
"Tor Iver Wilhelmsen" <jadedgamer (AT) hotmail (DOT) com> wrote in message
news:uk633nuaw.fsf (AT) hotmail (DOT) com...
"Hal Rosser" <hmrosser (AT) bellsouth (DOT) net> writes:
Math.floor(...) does not round, to nearest int - it rounds **down**
That's true for Math.floor(x), but not Math.floor(x + 0.5) as in the
example. In fact, the Javadocs for Math.round() says the method is
equal to (long)Math.floor(a + 0.5d)
|
Concept - the floor function will take the integer part of the number.
So, for example, Math.floor(3.6) is 3. To use floor for rounding, you
add 0.5. So, Math.floor(3.6+.5) = 4, while Math.floor(3.1+0.5) = 3.
The only error I see in your code is that you are rounding just the x
value. Unless I misread the assignment, just assign maximumvalue the
value of x, and before you set your return value do the rounding. |
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