QuadraticEqRoots

gistfile1.txt

import java.lang.Math;

public class QuadraticEqRoots{

        public static int gcd(int a,int b){
            int res = 0;
            while (b > 0){
             int temp = b;
             b = a % b;
             a = temp;
             res = a;
            }
            return res;
        }

     public static void main(String []args){
         
        double a = 1;
        double b = 8;
        double c = -20;
        
        
        
        double mcd = 0;
        
        String x1Str = null;
        String x2Str = null;
        
        double D = Math.pow(b,2)-(4*a*c);
        System.out.println(" ");
        
        int[] myArray = {(int)a, (int)b, (int)c};
        int result = gcd(myArray[0],myArray[1]);
        for(int i = 2; i < myArray.length; i++){
         result = gcd(result, myArray[i]);
        }
        mcd = result;
        
        System.out.println("Greatest Common Divisor: " + String.valueOf(mcd));
        System.out.println(" ");
        System.out.println("Discriminant: " + String.valueOf(D));
        System.out.println("");
        
        if (D > 0){
            System.out.println("Two solutions: ");
            double x1 = (-b + Math.sqrt(D)) / (2*a);
            double x2 = (-b - Math.sqrt(D)) / (2*a);
            
            x1Str = String.valueOf("(x + " + Math.abs(x1) + ")");
            x2Str = String.valueOf("(x + " + Math.abs(x2) + ")");
            if (x1 >= 0){
                x1Str = "(x - " + Math.abs(x1) + ")";
            }
            if (x2 >= 0){
                x2Str = "(x - " + Math.abs(x2) + ")";
            }
            System.out.println("");
            System.out.println("Result: " + x1Str + " " + x2Str);
            
        }
        if (D < 0){
            System.out.println("No solution...");
        }
        if (D == 0){
            System.out.println("One solution: ");
            double x1 = (-b + Math.sqrt(D)) / (2*a);
            double x2 = (-b - Math.sqrt(D)) / (2*a);
            
            x1Str = String.valueOf("(x + " + Math.abs(x1) + ")");
            x2Str = String.valueOf("(x + " + Math.abs(x2) + ")");
            if (x1 >= 0){
                x1Str = "(x - " + Math.abs(x1) + ")";
            }
            if (x2 >= 0){
                x2Str = "(x - " + Math.abs(x2) + ")";
            }
            if (x1 == 0){
                x1Str = "(x)";
            }
            if (x2 == 0){
                x2Str = "(x)";
            }
            
            
            System.out.println("");
            System.out.println("Result: " + x1Str + " " + x2Str + " (" + mcd + ")");
        }
     }
}