Program to find the roots of quadratic equation (Demonstration of else-if ladder)

 Program to find the roots of quadratic equation (Demonstration of else-if ladder)

#include<stdio.h>

#include<math.h>

void main ()

{

   float a,b,c,r1,r2,d;

   printf ("enter the values of a b c\n");

   scanf ("%f%f%f",&a,&b,&c);

   d= b*b-4*a*c;

   if (d>0)

   {

      r1 = -b+sqrt (d) / (2*a);

      r2 = -b-sqrt (d) / (2*a);

      printf ("The real roots = %f %f", r1, r2);

   }

   else if (d==0){

      r1 = -b/(2*a);

      r2 = -b/(2*a);

      printf ("roots are equal =%f %f", r1, r2);

   }

   else

      printf("Roots are imaginary");

  

}