I've convinced myself that they can't. Take for example: 4 4 + 4 / stack: 4 stack: 4 4 4 + 4 = 8 stack: 8 stack: 8 4 8 / 4 = 2 stack: 2 There are two ways that you could write the above expression with the same operators and operands such that the operands all come first: "4 4 4 + /" and "4 4 4 / +", neither of which evaluate to 2....
Is there any way to interpret Reverse Polish Notation into "normal" mathematical notation when using either C++ or C#? I work for an engineering firm, so they use RPN occasionally and we need a way to convert it. Any suggestions? ...
I currently have an application which can contain 100s of user defined formulae. Currently, I use reverse polish notation to perform the calculations (pushing values and variables on to a stack, then popping them off the stack and evaluating). What would be the best way to start parallelizing this process? Should I be looking at a functi...
I'm trying to parse a string in a self-made language into a sort of tree, e.g.: # a * b1 b2 -> c * d1 d2 -> e # f1 f2 * g should result in: # a * b1 b2 -> c * d1 d2 -> e # f1 f2 * g #, * and -> are symbols. a, b1, etc. are texts. Since the moment I know only rpn method to evaluate expressions, and my current solution...
hi i'm zoe . i have a project in my university about RPN calculator in Assembly language but i dont really know much . can someone help me out with the code ? thanks !!! ...
How do I read in the following input in my RPN calculator so that it will find the operator no matter what order? 2 2+ 4 As of now my scanf only sees the first char in the string and I can only do this: 2 2 + 4 I'm also trying to add an option for integer vs floating point mode. (ex. when 'i' is entered, operate in floating point a...
Hello everybody. I have to write, for academic purposes, an application that plots user-input expressions like: f(x) = 1 - exp(3^(5*ln(cosx)) + x) The approach I've chosen to write the parser is to convert the expression in RPN with the Shunting-Yard algorithm, treating primitive functions like "cos" as unary operators. This means the f...
I have a piece of code that converts an infix expression to an expression tree in memory. This works just fine. There's just one small trouble. I just connect work out how to involve the unary operators correctly (the right associative ones). With the following infix expression : +1 + +2 - -3 - -4 I would expect an RPN of: 1+2++3-4...
Hello: I have designed a quick and basic vector arithmetic library in C++. I call the program from the command line when I need a rapid cross product, or angle between vectors. I don't use Matlab or Octave or related, because the startup time is larger than the computation time. Again, this is for very basic operations. I am extending ...
The Program (115 Chars) (defun rpn(e)(let((s()))(dolist(x e)(if(numberp x)(push x s)(push(eval(reverse(list(pop s)(pop s)x)))s)))(car s))) A simple test: CL-USER> (rpn '(1 2 3 * + 4 2 / +)) And it returns 9 Anyone has some good ideas about writing an Infix-to-RPN program inside one single tweet? I failed. I can wrote that one in 2...
Here is a Python postfix notation interpreter which utilizes a stack to evaluate the expressions. Is it possible to make this function more efficient and accurate? #!/usr/bin/env python import operator import doctest class Stack: """A stack is a collection, meaning that it is a data structure that contains multiple el...