Program in C to find out Quardratic Equation (d=b2-4ac)

Write a program in C to find out Quardratic Equation (d=b2-4ac)

#include <stdio.h>

void main ()

{

          int a,b,c,d;

          clrscr ();

          printf ("Enter A: ");

          scanf ("%d",&a);

          printf ("Enter B: ");

          scanf ("%d",&b);

          printf ("Enter C: ");

          scanf ("%d",&c);

          d= (b*b)-(4*a*c);

          printf ("\nAnswer is %d",d);

          getch ();

}