public override Node MakeNodeClean(Node prevNodeNumber, out Node replacementNode)
{
Node garbage;
if (node1 is NodeLN && node2 is NodeLN) //exception
{
Node nodeDiv = new NodeDivision();
Node nodeln = new NodeLN();
nodeln.AddNode1(nodeDiv);
nodeDiv.AddNode1(Node1.Node1);
nodeDiv.AddNode2(node2.Node1);
nodeln.MakeNodeClean(null, out garbage);
replacementNode = null;
return(nodeln);
}
else
{
Node nodePlus = new NodePlus();
nodePlus.AddNode1(node1);
if (node2 is NodeNumber)
{
((NodeNumber)node2).SwapPositivity();
nodePlus.AddNode2(node2);
}
else if (node2 is NodeMinus)
{
Node newNode2 = node2.MakeNodeClean(null, out garbage); //node2 is now nodeplus
((NodePlus)newNode2).SwapPositivity();
nodePlus.AddNode2(newNode2);
}
else
{
Node nodeTimes = new NodeTimes();
Node nodeNumber = new NodeNumber(false, false, -1);
nodeTimes.AddNode1(nodeNumber);
nodeTimes.AddNode2(node2);
nodePlus.AddNode2(nodeTimes);
}
replacementNode = null;
nodePlus.MakeNodeClean(null, out garbage);
return(nodePlus);
}
}
