Program to find the roots of a quadratic equation

#include<iostream.h>
#include<conio.h>
#include<math.h>
void main()
{
clrscr();
int a,b,c,d;
float r1,r2;
cout<<"Enter the values of a,b & c : ";
cin>>a>>b>>c;
d=(b*b)-(4*a*c);
if(d==0)
{
    cout<<"Roots are real and equal ";
    r1=r2=(-b)/(2*a);
    cout<<r1<<" "<<r2;
}
else
if(d>0)
    {
        cout<<"Roots are real and unequal ";
        r1=(-b+sqrt(d))/(2*a);
        r1=(-b-sqrt(d))/(2*a);
    }
else
cot<<"Roots are imaginary";
getch();
}