• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 10570
  • Last Modified:

Change Postfix/Infix/Prefix notations using a Stack

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
axtur
Asked:
axtur
3 Solutions
 
Christopher KileCommented:
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
 
axturAuthor Commented:
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
 
purplepomegraniteCommented:
A very good walkthrough of infix to postfix notation is here: http://en.wikipedia.org/wiki/Shunting_yard_algorithm
0

Featured Post

The 14th Annual Expert Award Winners

The results are in! Meet the top members of our 2017 Expert Awards. Congratulations to all who qualified!

Tackle projects and never again get stuck behind a technical roadblock.
Join Now