An info 449 Assignment
Welcome to use SimpleCalc. This is a command line calculator that helps you do some simple calculation. It supports negative and decimal numbers. It also supports command line arguments.
Usage: calc <numbers... operation>
Or simply calc
Expression should be of the form "1+2" or "7*5"
Number list and operation shouble be of the form "1 2 3 avg" or "9 8 7 count"
Support operations:
avg for average
count for counting elements
fact for factorial (fact only accept one positive integer less than 20)