To find roots of a given Quadratic equation using Switch case .

#include<iostream.h>
#include<conio.h>
#include<math.h>
void main()
{
clrscr();
float a,b,c,d,e,x,r,t;
int D,z,f;
cout<<"Enter a= ";
cin>>a;
cout<<"enter b=";
cin>>b;
cout<<"Enter c=";
cin>>c;
D=b*b-4*a*c;
f=D>0?1:(D==0?2:(D<0?3:4));
switch (f)
{ case 1:
 x=(-b+sqrt(D))/(2*a);
 r=(-b-sqrt(D))/(2*a);
 cout<<"Roots of the Equation are Real"<<"\n";
 cout<<"Root 1 = "<<x<<"\n";
 cout<<"Root 2 = "<<r;
 break;
  case 2:
 x=(-b)/(2*a);
 cout<<"Root of the Equation are Real and Equal "<<"\n";
 cout<<"Root = "<<x;
 break;
  case 3:
 cout<<"Roots are Imaginary";
 break;
}
getch();
}