How to write a java to make a Pythagorean?

[kickerboy123]

I am learn java now, Can anyone give me a tip how to make a pythagorean triples by using Java ?
like using For or do.....while statement?

Thanks

Lai

 

[feherke]

Hi

With brute force, up to 2006 :

[b]for[/b] ([b]int[/b] i=1;i<=[green][i]2006[/i][/green];i++)
[b]for[/b] ([b]int[/b] j=1;j<=i;j++)
[b]if[/b] (Math.sqrt(i*i+j*j)==Math.round(Math.sqrt(i*i+j*j)))
System.out.println(j+[i]", "[/i]+i+[i]", "[/i]+Math.sqrt(i*i+j*j));

Feherke.

http://rootshell.be/~feherke/

 

[Diancecht]

I'm not sure that will work, I think you need to stablish a treshold:

for (int i=1;i<=2006;i++)
  for (int j=1;j<=i;j++)
    if (Math.sqrt(i*i+j*j)-Math.round(Math.sqrt(i*i+j*j))<0.00001)
System.out.println(j+", "+i+", "+Math.sqrt(i*i+j*j));

Cheers,
Dian

 

[feherke]

Hi

Hmm... You may be right. But as far as I observed during the test, seems that Java has no problem with this calculation.

But I think, your suggestion would look better this way :

if ([red]Math.abs([/red]Math.sqrt(i*i+j*j)-Math.round(Math.sqrt(i*i+j*j))[red])[/red]<0.00001)
System.out.println(j+", "+i+", "+Math.sqrt(i*i+j*j));

Feherke.

http://rootshell.be/~feherke/

 

[kickerboy123]

Thanks Feherke and Dian, i will try both program tonight ,

thanks a lot

Lai

 

[Diancecht]

Try feherke's, I forgot about the sign.

Cheers,
Dian