** CSE 100  Assignment #1 **
** Sample User Manual     **

The basic calculator provided by this program expects one
number or operation sign per input line.  Both operands
for the function must be input before the operation is
input.  The operation result is returned to the calculator 
memory for use in subsequent operations.  In the examples 
which follow, the programs output is shown indented.

This stack-based calculator employs integer arithmetic,
and provides the following operations:

+ addition
  Indicated by +, the top two numbers in the operand stack
are added and the result returned to the operand stack.

Example:
3
4
+
    7

* multiplication
  Indicated by *, the top two numbers in the operand stack 
are multiplied and returned to the top of the operand stack.

Example:
4
5
*
    20


- subtraction
  Indicated by -, the top number of the operand stack is
diminished by the penultimate (second-to-top) number on
the stack.  The result is returned to the operand stack.

Example:
4
5
-
    1


/ division
  Indicated by /, the top number of the operand stack is
divided by the penultimate number on the stack.  The result
is returned to the operand stack.


Etc., etc., etc.