2a. (iii). Quadratic Equation

Program:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace Practical2_a3

{

class Program

{

static void Main(string[] args)

{

int a, b, c;

double d, x1, x2;

Console.Write("\n\n");

Console.Write("Calculate root of Quadratic Equation :\n"); Console.Write("----------------------------------------");

Console.Write("\n\n");

Console.Write("Input the value of a : ");

a   = Convert.ToInt32(Console.ReadLine ()); Console.Write("Input the value of b : ");

                           b   = Convert.ToInt32(Console.ReadLine()); Console.Write("Input the value of c : ");

       c   = Convert.ToInt32(Console.ReadLine());

       d  = b * b - 4 * a * c;

  if  (d == 0)

    {

Console.Write("Both roots are equal.\n");

       x1 = -b / (2.0 * a);

       x2 = x1;

Console.Write("First Root Root1= {0}\n", x1); Console.Write("Second Root Root2= {0}\n", x2);

   }

else if (d > 0)

   {

             Console.Write("Both roots are real and diff-2\n");

   x1 = (-b + Math.Sqrt(d)) / (2 * a);

     x2 = (-b - Math.Sqrt(d)) / (2 * a);

Console.Write("First Root Root1= {0}\n", x1); 

Console.Write("Second Root root2= {0}\n", x2);

}

else

Console.Write("Root are imeainary;\nNo Solution. \n\n");                    Console.ReadKey();

}

}

}