// quad.cpp for CS11 lab 3.
// Using functions to compute the roots of a quadratic equation

#include <iostream.h>
#include <iomanip.h>
#include <math.h>

// Discriminant means:  the square root of (b*b - 4*a*c)
// Root 1 means:  (-b + discriminant) / (2*a)
// Root 2 means:  (-b - discriminant) / (2*a)

// The prototype for the quad function is given here:
void quad (double a, double b, double c);

// Additional function prototypes -- Complete the following:
discriminant();
root1();
root2();


int main()
{
  double a, b, c;

  // Get input from the user.
  cout << "Enter coefficients for quadratic equation:  ";
  cin >> a, b, c;

  // Now, apply the quadratic formula for these coefficients.
  quad (a, b, c);

  return 0;
}

// This function solves the quadratic equation given the coefficients
// a, b and c that were passed from the main function.
void quad(double a, double b, double c)
{
  double r1, r2;

  // Perform computations by calling specific functions.
  // Complete the assignments statements for r1 and r2:
  r1 = root1;
  r2 = root2;

  // Ready for output.
  cout << setprecision(4) << setiosflags (ios::fixed | ios:: showpoint);
  cout << "The roots of " << a << "x**2 + " << b
       << "x + " << c << " are "
       << r1 << " and "
       << r2 << endl;

  return;
}

// Complete the following function implementations:
discriminant()
{
  return ;
}

root1()
{
  return ;
}

root2()
{
  return ;
}