static void Main(string[] args)
{
TreeNode bin1 = Postfix.InfixToPostfix(Console.ReadLine()); // e.g "5 * 2 + 1" -> "5 2 * 1 +"
// Using TreeNode type, not BinOp (Binary Operator) as we cannot guarantee the root node of the abstract syntax tree will be an operator.
Console.WriteLine("To postfix:");
foreach (TreeNode node in Traversal.postOrder(bin1))
{
Console.Write(node.value + " ");
}
Console.WriteLine("\nTo infix:");
foreach (TreeNode node in Traversal.inOrder(bin1))
{
Console.Write(node.value + " ");
}
Console.WriteLine("\nTo prefix:");
foreach (TreeNode node in Traversal.preOrder(bin1))
{
Console.Write(node.value + " ");
}
Console.WriteLine();
// Now using reverse polish notation, calculate what the result is. This takes in a postfix-ordered list of TreeNodes.
Console.WriteLine("Answer: " + RPN.Evaluate(Traversal.postOrder(bin1)));
}
public static void Run()
{
Tokeniser tokeniser = new Tokeniser(Console.ReadLine());
List <Token> tokens = tokeniser.Tokenise().ToList();
TreeNode bin1 = TreeBuilder.BuildAST(tokens); // e.g "5 * 2 + 1" -> "5 2 * 1 +"
// Using TreeNode type, not BinOp (Binary Operator) as we cannot guarantee the root node of the abstract syntax tree will be an operator.
Console.WriteLine("To postfix:");
foreach (TreeNode node in Traversal.postOrder(bin1))
{
Console.Write(node.value + " ");
}
Console.WriteLine("\nTo infix:");
foreach (TreeNode node in Traversal.inOrder(bin1))
{
Console.Write(node.value + " ");
}
Console.WriteLine("\nTo prefix:");
foreach (TreeNode node in Traversal.preOrder(bin1))
{
Console.Write(node.value + " ");
}
Console.WriteLine();
// Now using reverse polish notation, calculate what the result is. This takes in a postfix-ordered list of TreeNodes.
Console.WriteLine("Answer: " + RPN.Evaluate(Traversal.postOrder(bin1)));
}
