public override Function SimplifyFunction()
{
Left = Left.SimplifyFunction();
Right = Right.SimplifyFunction();
if (Left.IsConstant() && Right.IsConstant())
{
return(new RealNumber(CalculateValue(0)));
}
if (Right.ToString() == "0")
{
return(Left);
}
if (Left is Substract && Right.IsConstant())
{
if (Left.Left.IsConstant())
{
Function function = new Substract();
function.Left = new RealNumber(Left.Left.CalculateValue(0) - Right.CalculateValue(0));
function.Right = Left.Right;
return(function.SimplifyFunction());
}
if (Left.Right.IsConstant())
{
Function function = new Substract();
function.Left = Left.Left;
function.Right = new RealNumber(Left.Right.CalculateValue(0) + Right.CalculateValue(0));
return(function.SimplifyFunction());
}
}
if (Right is Substract && Left.IsConstant())
{
if (Right.Left.IsConstant())
{
Function function = new Plus();
function.Left = new RealNumber(Left.CalculateValue(0) - Right.Left.CalculateValue(0));
function.Right = Right.Right;
return(function.SimplifyFunction());
}
if (Right.Right.IsConstant())
{
Function function = new Substract();
function.Left = new RealNumber(Left.CalculateValue(0) + Right.Right.CalculateValue(0));
function.Right = Right.Left;
return(function.SimplifyFunction());
}
}
if (Left is Plus && Right.IsConstant())
{
if (Left.Left.IsConstant())
{
Function function = new Plus();
function.Left = new RealNumber(Left.Left.CalculateValue(0) - Right.CalculateValue(0));
function.Right = Left.Right;
return(function.SimplifyFunction());
}
if (Left.Right.IsConstant())
{
Function function = new Plus();
function.Left = Left.Left;
function.Right = new RealNumber(Left.Right.CalculateValue(0) - Right.CalculateValue(0));
return(function.SimplifyFunction());
}
}
if (Right is Plus && Left.IsConstant())
{
if (Right.Left.IsConstant())
{
Function function = new Substract();
function.Left = new RealNumber(Left.CalculateValue(0) - Right.Left.CalculateValue(0));
function.Right = Right.Right;
return(function.SimplifyFunction());
}
if (Right.Right.IsConstant())
{
Function function = new Substract();
function.Left = new RealNumber(Left.CalculateValue(0) - Right.Right.CalculateValue(0));
function.Right = Right.Left;
return(function.SimplifyFunction());
}
}
if (Left is NaturalLogarithm && Right is NaturalLogarithm)
{
if (Left.Left.IsConstant() && Right.Left.IsConstant())
{
Function function = new NaturalLogarithm();
function.Left = new RealNumber(Left.Left.CalculateValue(0) / Right.Left.CalculateValue(0));
return(function.SimplifyFunction());
}
}
return(this);
}
private Function CreateTree()
{
Function currentNode = null;
string token = listNotations.First();
switch (token)
{
case "c":
currentNode = new Cosine();
listNotations.Remove(token);
currentNode.Left = CreateTree();
break;
case "/":
currentNode = new Divide();
listNotations.Remove(token);
currentNode.Left = CreateTree();
currentNode.Right = CreateTree();
break;
case "e":
currentNode = new Exp();
listNotations.Remove(token);
currentNode.Left = CreateTree();
break;
case "!":
currentNode = new Factorial();
listNotations.Remove(token);
currentNode.Left = CreateTree();
break;
case "*":
currentNode = new Multiply();
listNotations.Remove(token);
currentNode.Left = CreateTree();
currentNode.Right = CreateTree();
break;
case "l":
currentNode = new NaturalLogarithm();
listNotations.Remove(token);
currentNode.Left = CreateTree();
break;
case "n":
listNotations.Remove(token);
string valueN = listNotations.First();
currentNode = new NaturalNumber(Convert.ToInt32(valueN));
listNotations.Remove(valueN);
break;
case "x":
currentNode = new ParameterX();
listNotations.Remove(token);
break;
case "p":
currentNode = new Pi();
listNotations.Remove(token);
break;
case "+":
currentNode = new Plus();
listNotations.Remove(token);
currentNode.Left = CreateTree();
currentNode.Right = CreateTree();
break;
case "^":
currentNode = new Power();
listNotations.Remove(token);
currentNode.Left = CreateTree();
currentNode.Right = CreateTree();
break;
case "r":
listNotations.Remove(token);
string valueR = listNotations.First();
currentNode = new RealNumber(Convert.ToDouble(valueR));
listNotations.Remove(listNotations.First());
break;
case "s":
currentNode = new Sine();
listNotations.Remove(token);
currentNode.Left = CreateTree();
break;
case "-":
currentNode = new Substract();
listNotations.Remove(token);
currentNode.Left = CreateTree();
currentNode.Right = CreateTree();
break;
default:
currentNode = new NaturalNumber(Convert.ToInt32(token));
listNotations.Remove(token);
break;
}
return(currentNode);
}