Design and implement a complete program that uses the Postfix Calculator ADT to perform various operations extracted from the user. The user enters text-based commands, one per line, that should be performed by the calculator. For example, to compute 12 * 15, the user would enter the following sequence of commands:
which would result in 180 being displayed. Your program should respond to the following set of commands: ENTER, CLR, CLRLAST, RESULT, ADD, SUB, MUL, DIV, POW