public override ElfNumber Multiply(ElfNumber n)
{
if (n is EsathCurrency)
{
return new EsathCurrency(base.Multiply(n));
}
return new EsathNumber(base.Multiply(n));
}
public override ElfNumber Divide(ElfNumber n)
{
if (n is EsathCurrency)
{
return new EsathCurrency(base.Divide(n));
}
return new EsathNumber(base.Divide(n));
}
public virtual ElfNumber Divide(ElfNumber n)
{
if (n.Val == 0)
{
throw new ErroneousScriptRuntimeException(ElfExceptionType.DivisionByZero, VM);
}
return Val / n.Val;
}
public override ElfNumber Subtract(ElfNumber n)
{
if (n is EsathPercent)
{
return new EsathCurrency(Val * (1 - n.Val));
}
return new EsathCurrency(base.Subtract(n));
}
public override ElfNumber Power(ElfNumber n)
{
if (n is EsathCurrency)
{
throw new ErroneousScriptRuntimeException(ElfExceptionType.OperandsDontSuitMethod, VM);
}
return new EsathCurrency(base.Power(n));
}
public override ElfNumber Add(ElfNumber n)
{
if (n is EsathPercent)
{
return new EsathCurrency(Val * (1 + n.Val));
}
return new EsathCurrency(base.Add(n));
}
public override ElfNumber Multiply(ElfNumber n)
{
if (n is EsathPercent)
{
return new EsathPercent(((1 + Val) * (1 + n.Val) - 1) * 100);
}
return n.Multiply(this);
}
public override ElfNumber Subtract(ElfNumber n)
{
if (n is EsathPercent)
{
return new EsathPercent(base.Subtract(n) * 100);
}
throw new ErroneousScriptRuntimeException(ElfExceptionType.OperandsDontSuitMethod, VM);
}
public override ElfNumber Add(ElfNumber n)
{
if (n is EsathPercent)
{
return new EsathPercent(base.Add(n) * 100);
}
return n.Add(this);
}
public override ElfNumber Divide(ElfNumber n)
{
if (n is EsathCurrency)
{
throw new ErroneousScriptRuntimeException(ElfExceptionType.OperandsDontSuitMethod, VM);
}
if (n is EsathPercent)
{
return new EsathPercent(((1 + Val) / (1 + n.Val) - 1) * 100);
}
return new EsathPercent(base.Divide(n) * 100);
}
public virtual ElfNumber Power(ElfNumber n)
{
return Math.Pow(Val, n.Val);
}
public virtual ElfNumber Multiply(ElfNumber n)
{
return Val * n.Val;
}
public virtual ElfNumber Subtract(ElfNumber n)
{
return Val - n.Val;
}
public virtual ElfNumber Add(ElfNumber n)
{
return Val + n.Val;
}
public static EsathCurrency PMT(ElfNumber rate, EsathNumber nper, EsathCurrency pv, EsathCurrency fv, EsathNumber type)
{
if (type != 0 && type != 1)
{
throw new ErroneousScriptRuntimeException(ElfExceptionType.OperandsDontSuitMethod, rate.VM);
}
if (rate is EsathCurrency)
{
throw new ErroneousScriptRuntimeException(ElfExceptionType.OperandsDontSuitMethod, rate.VM);
}
double result;
if (rate == 0)
{
if (nper == 0)
{
throw new ErroneousScriptRuntimeException(ElfExceptionType.DivisionByZero, rate.VM);
}
result = (-pv - fv) / nper;
}
else
{
result = (-pv * Math.Pow(1 + rate, nper) - fv) / ((1 + rate * type) * ((Math.Pow(1 + rate, nper) - 1) / rate));
}
return new EsathCurrency(result);
}
