Solved

# Change Postfix/Infix/Prefix notations using a Stack

Posted on 2008-06-18
10,494 Views
How do I change a given expression in infix notation to prefix and postfix notations using a stack?? Step by step?? What would be the state of the stack during the process??

lets say the next expression: (3+4)*6/2
0
Question by:axtur
[X]
###### Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

• Help others & share knowledge
• Earn cash & points

LVL 84

Assisted Solution

ozo earned 100 total points
ID: 21817826
0

LVL 23

Accepted Solution

Christopher Kile earned 200 total points
ID: 21817851
This sounds like a homework problem, so no specific solution will be offered until you convince me otherwise.

That said, I suggest to you first that you translate your infix expression into prefix and postfix forms, and remember that parentheses promote the surrounded expression to a greater precendence than any operator.
0

Author Comment

ID: 21817962
This is not a homework problem, it is a solution to an exam from the last year, the real expression given was like 8 times that. The expresion can be that or any other, I don't mind, I just need a simple example with the trouble combinations (what to do when there are two operators in the stack? when to push an operator or a number?)

I just want to know the stack algorithm, the process. When to push and when to pop from the stack.

Can be a expression translated from postfix directly to prefix or do I need first to go thru the infix form?
0

LVL 24

Assisted Solution

purplepomegranite earned 200 total points
ID: 21818000
A very good walkthrough of infix to postfix notation is here: http://en.wikipedia.org/wiki/Shunting_yard_algorithm
0

## Featured Post

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

What is Waterfall Model? Waterfall model is the classic Software Development Life Cycle method practiced in software development process. As the name "waterfall" describes, this development is flowing downwards steadily like waterfall, i.e., procee…
Dependencies in Software Design In software development, the idea of dependencies (http://en.wikipedia.org/wiki/Coupling_%28computer_programming%29) is an issue of some importance. This article seeks to explain what dependencies are and where they …
I've attached the XLSM Excel spreadsheet I used in the video and also text files containing the macros used below. https://filedb.experts-exchange.com/incoming/2017/03_w12/1151775/Permutations.txt https://filedb.experts-exchange.com/incoming/201…
Michael from AdRem Software outlines event notifications and Automatic Corrective Actions in network monitoring. Automatic Corrective Actions are scripts, which can automatically run upon discovery of a certain undesirable condition in your network.…
###### Suggested Courses
Course of the Month6 days, 10 hours left to enroll