/******************************************************************************
   Lab Exercise #5 -- Implementation of driver module
******************************************************************************/

using namespace std;

#include <iostream>
#include <iomanip>

#include "lab05.support.h"

extern int InputStatus;

/*-----------------------------------------------------------------------------
   Name:  main

   Purpose:  Compute the roots of a quadratic equation.
-----------------------------------------------------------------------------*/

int main()
{
  int RootStatus;
  double A, B, C, Root1, Root2;

  cout << setiosflags( ios::fixed ) << setprecision( 1 );

  for (;;)
  {
    InputStatus = 0;

    coefficients( A, B, C );

    if (InputStatus == 0) break;

    RootStatus = roots( A, B, C, Root1, Root2 );

    cout << endl << "The equation:" << endl << endl;
    cout << "  " << A << " x^2 + " << B << " x + " << C << endl;

    switch (RootStatus)
    {
      case 0:
        cout << endl << "has the following roots:" << endl << endl;
        cout << "  root 1 = " << Root1 << endl;
        cout << "  root 2 = " << Root2 << endl << endl;
        break;

      case 1:
        cout << endl << "has the following root:" << endl << endl;
        cout << "  root = " << Root1 << endl << endl;
        break;

      case 2:
        cout << endl << "has complex roots." << endl << endl;
        break;
	
      case 3:
        cout << endl << "is not quadratic." << endl << endl;
        break;
    }
  }
}