[Src] Simple quadratic equation solver

[Freddy1990]

I was bored, quickly wrote up this:

/**
* Quadratic equation solver
* @author Freddy1990
*
*/

public class Quadratic {

/**
* Main method to solve the equation.
* @param a The first value of the equation
* @param b The second value of the equation
* @param c The third value of the equation
*/

public Quadratic(int a, int b, int c) {
double D = Math.pow(b, 2) - 4 * a * c;
if (D < 0)
System.out.println("No solutions");
else if (D == 0) {
double x = -b / (2 * a);
System.out.println("Discriminant = " + String.valueOf(D));
System.out.println("One solution:");
System.out.println("x = " + String.valueOf(x));
} else {
double x1 = (-b + Math.sqrt(D)) / (2 * a);
double x2 = (-b - Math.sqrt(D)) / (2 * a);
System.out.println("Discriminant = " + String.valueOf(D));
System.out.println("Two solutions:");
System.out.println("x1 = " + String.valueOf(x1));
System.out.println("x2 = " + String.valueOf(x2));
}
}

/**
* @param args
*/
public static void main(String[] args) {
if (args.length == 3) {
int a = Integer.parseInt(args[0]);
if (a != 0) {
int b = Integer.parseInt(args[1]);
int c = Integer.parseInt(args[2]);
System.out.println("ax² + bx + c");
System.out.println("a = " + args[0] + " , b = " + args[1] + " , c = " + args[2]);
new Quadratic(a, b, c);
} else
System.out.println("The first value of a quadratic equation cannot be 0.");
} else {
System.out.println("Usage: value1 value2 value3");
}
}

}

You enter the values trough commandline, run it like this:
java Quadratic a b c

[Dunceiam]

[Off-topic] :p I looked at the title and saw "Simple". Then I read on, "Quadratic Equation Solver". Oxy-moron? :D [/Off-topic]

Sry for the random post :).

-Dunceiam

[WhiteShadow]

[Off-topic] :p I looked at the title and saw "Simple". Then I read on, "Quadratic Equation Solver". Oxy-moron? :D [/Off-topic]

Sry for the random post :).

-Dunceiam

When you first learn Java programming (or maybe any other language), you always start off with arithmetic programs. Depends though, if you haven't taken Algebra or not yet, harharhar.

I'm looking into Java, atm also Freddy. :p:)

[Freddy1990]

Actually, I started building a bot, which I'm still doing, with some recycled code and ehlp from Yakman, Ace, Benland and Zappacky I was able to create a stable bot base which I'm working on now :)
This was just to get rid of my boredness :)

[Wizzup?]

Actually, I started building a bot, which I'm still doing, with some recycled code and ehlp from Yakman, Ace, Benland and Zappacky I was able to create a stable bot base which I'm working on now :)
This was just to get rid of my boredness :)

Talk to pups about that.
He was actually making a Java bot I think...

[Freddy1990]

Hmm, why do I need to talk to him then?

[wired16]

im learning java atm.. and after i learn it ... i may make a bot... lol with some help obv

[Freddy1990]

I couldn't possibly do that, I'm learning it while making a bot, well, I already knew some basics, btu anyway...