/// <summary>
/// Compares two Constraints
/// </summary>
public static bool AreConstraintsEquals(Constraint first, Constraint second)
{
if (first.Sign != second.Sign || first.RightSide != second.RightSide)
return false;
for (var i = 0; i < 2; i++)
{
foreach (var var in first.LeftSide)
{
var sCoeff = GetCoefficientByLabel(second, var.Label);
if (sCoeff == null)
{
if (var.Coefficient == 0)
continue;
return false;
}
if (var.Coefficient != sCoeff)
return false;
}
var tmp = first;
first = second;
second = tmp;
}
return true;
}
private static Fraction GetCoefficientByLabel(Constraint lim, string label)
{
foreach (var var in lim.LeftSide)
if (var.Label == label)
return var.Coefficient;
return null;
}
/// <summary>
/// Represents math Constraint(copy of input Constraint)
/// </summary>
public Constraint(Constraint constraint)
{
_leftSide = new List<Variable>(constraint._leftSide);
Sign = constraint.Sign;
_rightSide = new Fraction(constraint._rightSide);
}
/// <summary>
/// Adds input constraint to current
/// </summary>
/// <param name="constraint">Constraint that must be equal</param>
/// <exception cref="FormatException">If one of the constraints is not equal</exception>
public void Add(Constraint constraint)
{
if (constraint.Sign != "=" || Sign != "=")
throw new FormatException("Constraints must be equal constraints");
var current = new EqualityConstraint(LeftSide, RightSide);
var input = new EqualityConstraint(constraint.LeftSide, constraint.RightSide);
current.Add(input);
_leftSide = new List<Variable>(current.LeftSide);
_rightSide = current.RightSide;
}