conversion from infix to prefix

Question

I am preparing for an exam where i couldn\'t understand the convertion of infix notation to polish notation for the below expression:

(a–b)/c*(d + e – f / g)         


        

Answer 1

Infix to PostFix using Stack:

     Example: Infix-->         P-Q*R^S/T+U *V
     Postfix -->      PQRS^*T/-UV

     Rules:
    Operand ---> Add it to postfix
    "(" ---> Push it on the stack
    ")" ---> Pop and add to postfix all operators till 1st left parenthesis
   Operator ---> Pop and add to postfix those operators that have preceded 
          greater than or equal to the precedence of scanned operator.
          Push the scanned symbol operator on the stack