// An interface for a quadratic equation.
// Barry Cornelius, 28th February 2000
public interface QE
{
   public double getA();
   public double getB();
   public double getC();
   public void setA(double pA);
   public void setB(double pB);
   public void setC(double pC);
   public boolean equals(Object pObject);
   public int hashCode();
   public String toString();
   public boolean isReal();
   public double getRoot1();
   public double getRoot2();
}