Quadratic formula solver in Java

[Govind]

Cheap imitation of SuF's version

I don't know Java too well (but I do know C++), this is just my attempt to write something in Java using Microsoft Visual J++ 6.0, a 10-year old Java compiler that is long since deprecated and unsupported, but I have it, so I might as well use it a bit.

import java.lang.Math;
public class Class1
{
	public static void main (String[] args)
	{
		double a = 0, b = 0, c = 0;
		try{
			a = Double.valueOf(args[0].trim()).doubleValue();
			b = Double.valueOf(args[1].trim()).doubleValue();
			c = Double.valueOf(args[2].trim()).doubleValue();
		}
		catch(NumberFormatException nfe)
		{
			System.out.println("NumberFormatException: " + nfe.getMessage());
			return;
		}
		catch(ArrayIndexOutOfBoundsException oobe)
		{
			System.out.println("ArrayIndexOutOfBoundsException: " + oobe.getMessage());
			return;
		}
		if(((b*b)-(4*a*c))<0)
		{
			System.out.println("Nonreal roots");
		}
		else
		{
			double x1 = (-b+Math.sqrt((b*b)-(4*a*c)))/(2*a);
			double x2 = (-b-Math.sqrt((b*b)-(4*a*c)))/(2*a);
			System.out.print("x[1] = ");
			System.out.print(x1);
			System.out.print("\n");
			System.out.print("x[2] = ");
			System.out.print(x2);
			System.out.print("\n");
		}
	}
}

 

[SuF]

You code weird! D:

 

[Govind]

Specifically what do you mean?

This code is formatted the way most professional code is.

 

[SuF]

Specifically what do you mean?

This code is formatted the way most professional code is.

Mainly because you used args, instead of asking for input later...

 

[Govind]

That's what args[] is there for.

 

[Nullware]

Mainly because you used args, instead of asking for input later...

Well, if that's weird then obviously weird = more efficient.

 

[SuF]

Well, if that's weird then obviously weird = more efficient.

Faa, I like my way so I can loop easily... :/

 

[Swan]

Faa, I like my way so I can loop easily... :/

I like the UNIX terminal tbh.
http://www.injunea.demon.co.uk/pages/page205.htm



Well, depends on how user friendly you want to be as to which method you use. Personally I just use what's there, rather than making up my own silly methods (therefore I use args, which are easier to read).

 

[Govind]

3-1

You lose, SuF

 

[HyperSecret]

Nice, ever thought of adding an input of some sort?

Where a person can input an equation and you filter through and figure out the answer?

I could input x^2+4x+2 and it filters through and finds what a, b and c is.
Could even add in a factoring method that would be fun.

That would make it pretty sweet.

p.s. - have it figure out imaginaries.

 

[SuF]

3-1

You lose, SuF

Ummmm, my vote counts as 4 since this is a "Cheap imitation of SuF's version "




But what ever... New project, make a gui and lets argue about that!

 

[cars go fast]

Specifically what do you mean?

This code is formatted the way most professional code is.

Well it's definately coded the way I am being taught how to.

I am taking a basic Java course... it's not a basic class, but it is Advanced Computer Science with basic knowledge of Java.

Help me out next semester? lol. Please? I was forced to take this class as part of an IB Diploma Program. =(

 

[Govind]

Post questions in this forum and I'll try and get to you.

 

[Govind]

Nice, ever thought of adding an input of some sort?

Where a person can input an equation and you filter through and figure out the answer?

I could input x^2+4x+2 and it filters through and finds what a, b and c is.
Could even add in a factoring method that would be fun.

That would make it pretty sweet.

p.s. - have it figure out imaginaries.

Too much effort, sorry.