public Math_Node(Math_Node math_Node)
{
Operation = math_Node.Operation;
Root_Node = math_Node.Root_Node;
Value = math_Node.Value;
if (math_Node.Left != null)
{
Left = new Math_Node(math_Node.Left);
}
if (math_Node.Right != null)
{
Right = new Math_Node(math_Node.Right);
}
}
/*
*---------------------------One of the most important functions of the program----------------------------------------
* Called when the equal sign is written
*/
private double Calculate_Value()
{
List <Mouse_Data> L = new List <Mouse_Data>();
for (int i = 0; i < Screen.Count; i++)
{
Mouse_Data D = Screen[i];
if (D.Label != "equals" && !D.Calculated)
{
L.Add(D);
}
Screen[i].Calculated = true;
}
Math_Node Tree = new Math_Node(L);
return(Tree.Calculate());
}
private void Build_Tree(string Formula, int start = 0, int end = -1)
{
//end = -1 means that the end is at default value
if (end == -1)
{
end = Formula.Length - 1;
}
//Iterator
int i = start;
//IsDigit: Whether the Left Node should be built as Number node
//IsP: Whether the Left Node should be built by recursion
bool IsDigit = false, IsP = false;
//Left Node is number
if (IsDigit = char.IsDigit(Formula[i]))
{
String_Calc.Jump_Till_End_Number(Formula, ref i);
}
//Left Node is new formula
else if (IsP = (Formula[i] == '('))
{
String_Calc.Jump_Till_Out(Formula, ref i);
i++;
}
//The Formula only consist of a number
if (i > end)
{
Value = Extract_Number(Formula, start);
Root_Node = true;
return;
}
if (Formula[i] == '(')
{
Left = new Math_Node();
Right = new Math_Node();
//default to multply
Left.Build_Tree(Formula, start, i - 1);
int j = i;
String_Calc.Jump_Till_Out(Formula, ref j);
Right.Build_Tree(Formula, i + 1, j - 1);
Operation = '*';
return;
}
//It is now assumed that the next character is the current Operator
Operation = Formula[i];
//Build the Left Node
if (IsDigit)
{
Left = new Math_Node(Extract_Number(Formula, start));
}
else if (IsP)
{
Left = new Math_Node();
Left.Build_Tree(Formula, start + 1, i - 2);
}
//Now goto the Right Node
i++;
//The Right Node is a number
if (char.IsDigit(Formula[i]))
{
Right = new Math_Node(Extract_Number(Formula, i));
}
//The Right Node is a new formula
else if (Formula[i] == '(')
{
Right = new Math_Node();
Right.Build_Tree(Formula, i + 1, end - 1);
}
}