d= ?

d=b*b-4*a*c;

x1=(-b+sqrt(d))/(2*a);
x2=(-b-sqrt(d))/(2*a);

int main()
{
  double a,b,c,d,x1,x2;
 
  using namespace std;
 
  cout<<"a=";
  cin>>a;
  cout<<"b=";
  cin>>b;
  cout<<"c=";
  cin>>c;
 
  d=b*b-4*a*c;
 
 
  x1=(-b+sqrt(d))/(2*a);
  cout<<"x1="<<x1;
 
  x2=(-b-sqrt(d))/(2*a);
  cout<<"x2="<<x2;
 
 
  cout<<endl<<"Press any key to finish...";
 
  getch();
  return 0;
}