[anne-tic]

hello there.. i really dont know how to do the distance formula in java can u help me?? thanxz

[Gloin]

Are you talking about distance between two points?
In what dimension? 2-D, 3-D, n-D?

[mostyfriedman]

that's an easy one, you can use the math.sqrt(), math.pow(), addition and subtraction..

[pbl]

mostyfriedman, on 18 Jan, 2009 - 07:58 AM, said:

that's an easy one, you can use the math.sqrt(), math.pow(), addition and subtraction..

Pythagore was the name of the guy
You just need sqrt()

[BigAnt]

distance

[pbl]

BigAnt, on 18 Jan, 2009 - 12:56 PM, said:

distance

You're right
but I would have done:
deltax *= deltax;
deltay *= deltay;
instead of
determinant = Math.power(deltax, 2.0); // or whatever the method name/parameters are

[anne-tic]

pbl, on 18 Jan, 2009 - 12:42 PM, said:

mostyfriedman, on 18 Jan, 2009 - 07:58 AM, said:

that's an easy one, you can use the math.sqrt(), math.pow(), addition and subtraction..

Pythagore was the name of the guy
You just need sqrt()

yah the pythagorean theorem.... i have this
answer = Math.sqrt(temp);

do i have to declare this one and initialize or put this on formula portion??

[markhazlett9]

Well you always always always at some point in the program need to initialize your variables... so yes you will need to initialize it.

[anne-tic]

markhazlett9, on 19 Jan, 2009 - 10:11 AM, said:

Well you always always always at some point in the program need to initialize your variables... so yes you will need to initialize it.

import java.util.Scanner;

public class Hypotenuse
{

public static void main(String args[])
{
Scanner input=new Scanner(System.in);


int length=0;
int firstleg=^2;
int secondleg=^2;
int hypo=0;
int hypo2=0;

System.out.println( "Enter first leg of

right triangle:" );
firstleg =(int) input.nextDouble();


System.out.println( "Enter second leg of

right triangle:" );
secondleg =(int) input.nextDouble();



hypo= firstleg^2+secondleg^2;
hypo2=Math.sqrt(hypo);



System.out.printf("Hypotenuse is %d",hypo);








}

}



here's my codes.. it did run but i dont know if it's correct....

[mostyfriedman]

what do u mean by

int firstleg=^2;
int secondleg=^2; 

and also why did you cast firstleg and secondleg, why didnt you just input them as ints

int firstleg = input.nextInt();
int secondleg = input.nextInt();

[Locke]

pbl, on 18 Jan, 2009 - 12:42 PM, said:

mostyfriedman, on 18 Jan, 2009 - 07:58 AM, said:

that's an easy one, you can use the math.sqrt(), math.pow(), addition and subtraction..

Pythagore was the name of the guy
You just need sqrt()

Wasn't his name Pythagoras?

And yeah, you only need Math.sqrt() and the ability to subtract. (or add, depending on the way you wanna do it)

This post has been edited by Locke37: 19 January 2009 - 12:57 PM

[anne-tic]

Locke37, on 19 Jan, 2009 - 11:55 AM, said:

pbl, on 18 Jan, 2009 - 12:42 PM, said:

mostyfriedman, on 18 Jan, 2009 - 07:58 AM, said:

that's an easy one, you can use the math.sqrt(), math.pow(), addition and subtraction..

Pythagore was the name of the guy
You just need sqrt()

Wasn't his name Pythagoras?

And yeah, you only need Math.sqrt() and the ability to subtract. (or add, depending on the way you wanna do it)

hello there im almost done... how can i declare a double??? im so clueless that's why i tried ab=^2 stands for ab raise to the power of 2

[mostyfriedman]

for doubles

double x = input.nextDouble();

to raise something to the power of 2

x *= x;

[Locke]

Yeah...the ^ operator does not work like a power operator. It's a bit-wise operator...in other words, don't use them here.

In your power situation...

// raises 5 to the 4th power.
Math.pow(5, 4);

You can either do it that way, or if you're just squaring it...look at the post above mine.

This post has been edited by Locke37: 19 January 2009 - 01:25 PM

[anne-tic]

Locke37, on 19 Jan, 2009 - 12:25 PM, said:

Yeah...the ^ operator does not work like a power operator. It's a bit-wise operator...in other words, don't use them here.

In your power situation...

// raises 5 to the 4th power.
Math.pow(5, 4);

You can either do it that way, or if you're just squaring it...look at the post above mine.

hello there....i tried the Math.sqrt(); but still it's in error