/// <summary>
/// Solve the equation!
/// This method recurses into the whole tree and returns a result from the equation.
/// </summary>
/// <param name="paramCallback">Parameter callback that will be used to get teh values of parameter nodes.</param>
/// <returns>The solution of this node and all its subnodes!</returns>
public override float Solve(ParamDelegate paramCallback)
{
//make sure this node is set up correctly
Debug.Assert(null != Prev);
Debug.Assert(null != Next);
//Solve the sub nodes!
float prevResult = Prev.Solve(paramCallback);
float nextResult = Next.Solve(paramCallback);
//what kind of operator do we got?
switch (OrderOfOperationsValue)
{
case PemdasValue.Exponent:
{
return((float)Math.Pow(prevResult, nextResult));
}
case PemdasValue.Multiplication:
{
return(prevResult * nextResult);
}
case PemdasValue.Division:
{
//TODO: can hit divide by zero exception here
return(prevResult / nextResult);
}
case PemdasValue.Addition:
{
return(prevResult + nextResult);
}
case PemdasValue.Subtraction:
{
return(prevResult - nextResult);
}
default:
{
throw new NotSupportedException("found a weirdo thing in an equation node?");
}
}
}
/// <summary>
/// Solve the equation!
/// This method recurses into the whole tree and returns a result from the equation.
/// </summary>
/// <param name="paramCallback">Parameter callback that will be used to get teh values of parameter nodes.</param>
/// <returns>The solution of this node and all its subnodes!</returns>
public override double Solve(ParamDelegate paramCallback)
{
//make sure this node is set up correctly
//check arguments
if (null == Prev)
{
throw new ArgumentNullException("Prev");
}
if (null == Next)
{
throw new ArgumentNullException("Next");
}
//Solve the sub nodes!
double prevResult = Prev.Solve(paramCallback);
double nextResult = Next.Solve(paramCallback);
//what kind of operator do we got?
switch (OrderOfOperationsValue)
{
case PemdasValue.Exponent:
{
return(Math.Pow(prevResult, nextResult));
}
case PemdasValue.Multiplication:
{
return(prevResult * nextResult);
}
case PemdasValue.Division:
{
//guard against divide by zero exception
if (0.0 == nextResult)
{
return(0.0);
}
else
{
return(prevResult / nextResult);
}
}
case PemdasValue.Modulo:
{
//guard against divide by zero exception
if (0.0 == nextResult)
{
return(0.0);
}
else
{
return(prevResult % nextResult);
}
}
case PemdasValue.Addition:
{
return(prevResult + nextResult);
}
case PemdasValue.Subtraction:
{
return(prevResult - nextResult);
}
default:
{
throw new NotSupportedException("found a weirdo thing in an equation node?");
}
}
}
