/// <summary>
/// Converts all sub-variables into an equation
/// or into its value
/// </summary>
/// <returns>output new equation</returns>
public override IArithmetic Converting()
{
if (this.IsVariableExists(this.Name))
{
IArithmetic f = this.GetVariable(this.Name);
if (f is Function)
{
Function fe = f as Function;
for (int index = 0; index < fe.Parameters.Count; ++index)
{
if (fe.Parameters[index] is Coefficient)
{
Coefficient coeff = fe.Parameters[index] as Coefficient;
this.AddVariable(coeff.Name, this.Parameters[index].Converting());
}
if (fe.Parameters[index] is UnknownTerm)
{
UnknownTerm xt = fe.Parameters[index] as UnknownTerm;
this.AddVariable(xt.Name, this.Parameters[index].Converting());
}
if (fe.Parameters[index] is Function)
{
Function fun = fe.Parameters[index] as Function;
this.AddVariable(fun.Name, this.Parameters[index].Converting());
}
}
return(fe.RightOperand.Converting());
}
}
return(this);
}
private Arithmetic calculate()
{
Arithmetic a = null, b = null;
Arithmetic res = new NumericValue(0.0d);
switch (this.stock[this.index])
{
case '=':
++this.index;
a = this.calculate();
b = this.calculate();
res = new Equal(a, b);
break;
case '+':
++this.index;
a = this.calculate();
b = this.calculate();
res = new Addition(a, b);
break;
case '-':
++this.index;
a = this.calculate();
b = this.calculate();
res = new Soustraction(a, b);
break;
case '*':
++this.index;
a = this.calculate();
b = this.calculate();
res = new Multiplication(a, b);
break;
case '/':
++this.index;
a = this.calculate();
b = this.calculate();
res = new Division(a, b);
break;
case '^':
++this.index;
a = this.calculate();
b = this.calculate();
res = new Power(a, b);
break;
case 'v':
++this.index;
a = this.calculate();
b = this.calculate();
res = new Root(a, b);
break;
case 'p':
++this.index;
string funp = this.words[(int)this.stock[this.index]];
res = new Parenthese(Expression.Convert(funp));
++this.index;
break;
case 'g':
++this.index;
string fung = this.words[(int)this.stock[this.index]];
res = new Crochet(Expression.Convert(fung));
++this.index;
break;
case '@':
++this.index;
res = new NumericValue((double)this.stock[this.index]);
++this.index;
break;
case 'ù':
++this.index;
if (this.isNotLower(this.words[(int)this.stock[this.index]]))
{
res = new UnknownTerm(this.words[(int)this.stock[this.index]]);
}
else
{
res = new Coefficient(this.words[(int)this.stock[this.index]]);
}
++this.index;
break;
case 'µ':
++this.index;
string fun = this.words[(int)this.stock[this.index]];
++this.index;
res = new Function(fun, this.calculate());
break;
case ',':
string paramLeft = string.Empty, paramRight = string.Empty;
if (this.stock[index] == ',')
{
++this.index;
a = this.calculate();
}
else
{
b = this.calculate();
}
if (this.stock[index] == ',')
{
++this.index;
b = this.calculate();
}
else
{
b = calculate();
}
List <IArithmetic> list = new List <IArithmetic>();
if (a is Sequence)
{
list.AddRange((a as Sequence).Items);
}
else
{
list.Add(a);
}
if (b is Sequence)
{
list.AddRange((b as Sequence).Items);
}
else
{
list.Add(b);
}
res = new Sequence(list);
break;
}
return(res);
}
/// <summary>
/// Computes a weight from a coefficient object
/// </summary>
/// <param name="c">coefficient object</param>
/// <returns>weight of this object</returns>
public static Weight ComputeWeight(Coefficient c)
{
return(new Weight(CoefficientValueType, c.Name, c));
}
/// <summary>
/// Constructor for a simple term
/// </summary>
/// <param name="constant">store a constant value</param>
/// <param name="letter">store a coefficient</param>
/// <param name="unknown">store an unknown term</param>
public Term(double constant, string letter, string unknown)
{
this[constantName] = new NumericValue(constant);
this[coefName] = new Coefficient(letter, 0.0d);
this[unknownName] = new UnknownTerm(unknown, new NumericValue(0.0d));
}