Java program for the quadratic equation ax2 + bx + c = 0

Week1 :

a) Write a Java program that prints all real solutions to the quadratic equation ax2 + bx + c = 0. Read in a, b, c and use the quadratic formula. If the discriminate b2-4ac is negative, display a message stating that there are no real solutions.

import java.io.*;

import java.io.*;

class root

{

  public static void main(String args[])throws IOException

  {

   BufferedReader br=new BufferedReader(new InputStreamReader(System.in));

   int a=Integer.parseInt(br.readLine());

   int b=Integer.parseInt(br.readLine());

   int c=Integer.parseInt(br.readLine());

   int d=((b*b)-(4*a*c));

    if(d>0)

   {

    system.out.print("roots are real and distinct");

    }

  if(d==0)

  {

   system.out.print("roots are real");

  }

  if(d<0)

  {

  system.out.print("there is no solution");

  }

 }

}

b) Write a Java program that uses both recursive and non recursive functions to print the nth value in the Fibonacci sequence.

import java.io.*;

import java.lang.*;

class fibonacci

{

  public static void main(String args[]) throws IOException

  {

   int a=Integer.parseInt(args[0]);

   int b=Integer.parseInt(args[1]);

   int n=Integer.parseInt(args[2]);

   int c=0;

   while(c

   {

    c=a+b;

   system.out.print(c);

   a=b;

   b=c;

  }

 }

}