CPSC 170 PreLab 10
Postfix Expressions and Modular Arithmetic

1. Convert each infix expression below to postfix:
   1. a + (b * (c - (d / e)))

      
      
      

   2. (((a + b) * c) - d) / e

      
      
      

2. Convert each postfix expression below to infix.
   1. a b c d e f + * - / %

      
      
      

   2. a b c d + * e f - / %

      
      
      

3. Use a stack to evaluate the postfix expression below. Show your work.

   50   20   5   -   2   1   +   *   -

   
   
   
   
   
   
   
   
   
   
   

4. Evaluate each expression below.
   1. (3 + 5) % 6

   2. (4 * 2 + 3) % 5

   3. ((n-1) + 2) % n, n > 2