public override IResultValue Evaluate()
{
IResultValue res = Operand.Evaluate();
if (!((double)res.ToDecimal()).IsInteger(8))
{
throw new EvaluationException(this,
"Cannot use floating-point types in factorial calculation.");
}
return(new ResultNumberReal((decimal)MathPlus.Probability.Factorial(res.ToInteger())));
}
public override IResultValue Evaluate()
{
IResultValue res1 = First.Evaluate();
IResultValue res2 = Second.Evaluate();
if (!((double)res1.ToDecimal()).IsInteger(8) || !((double)res2.ToDecimal()).IsInteger(8))
{
throw new EvaluationException(this,
"Cannot use floating-point types in modulus calculation.");
}
return(new ResultNumberReal((decimal)(res1.ToInteger() % res2.ToInteger())));
}
public override IResultValue Evaluate()
{
IResultValue list = List.Evaluate();
IResultValue index = Index.Evaluate();
if (index.Type != MathType.Integer)
{
throw new EvaluationException(this, "Ordinal index must be integer.");
}
if (list.Type != MathType.List)
{
throw new EvaluationException(this, "Ordinal access can only be used on a list.");
}
return(new ResultNumberReal(list.ToList()[(int)index.ToInteger()]));
}
public override IResultValue Evaluate()
{
string str = First.Evaluate().ToString();
IResultValue countIRV = Second.Evaluate();
if (countIRV.Type != MathType.Integer)
{
throw new EvaluationException("That's no integer....");
}
int count = (int)countIRV.ToInteger();
string res = "";
for (int i = 0; i < count; i++)
{
res += str;
}
return(new ResultString(res));
}