Program to get imagenary Roots

#include"stdio.h"
#include"conio.h"
#include"math.h"
main()
{
int a,b,c;
float r1,r2,v1,v2;
clrscr();
printf("enter value of a,b,c");
scanf("%d %d %d",&a,&b,&c);
v1=(b*b)-(4*a*c);
if(v1<0)
{
printf("%f",v1);
printf("\n the root are imagenary");
}
else
v2=sqrt(v1);
r1=((-b)+v2)/(a*2);
r2=((-b)-v2)/(2*a);
printf("answer=%f\t%f",r1,r2);
getch();
}