CPSC 170 PreLab 9
Postfix Expressions

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

      
      
      

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

      
      
      

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

      
      
      

2. Use a stack to evaluate each postfix expression below. Show your work.
   1. 10   2   /   3   -   4   5   *   +

      
      
      
      
      
      
      
      
      
      
      

   2. 50   20   5   -   2   1   +   *   -