C program to find roots of a quadratic equation

WRITE A C PROGRAM TO FIND THE ROOTS OF A QUADRATIC EQUATION




#include<stdio.h>
#include<conio.h>
#include<math.h>
void main()
{
  int a,b,c,r,i,im;
  printf("Enter the value of arbitrary constants of the quadratic equation:\n");
  scanf("%d%d%d",&a,&b,&c);
  r=-b/2*a;
  i=b*b-4*a*c;
  if(i<0)
   im=-1*i;
  else
   im=i;
  im=(sqrt(im))/2*a;
  printf("The 1st root of the equation is: %d+%di",r,im);
  printf("The 2nd root of the equation is: %d-%di",r,im);
  getch();
}


Output:
   Enter the value of the arbitrary constant of the quadratic equation:
   1
   4
   3
   The 1st root of the equation is: -2+1i
   The 2nd root of the equation is: -2-1i