****C++ program that uses a single stack that will read postfix expressions and prints their values.

WITH COMMENTS ON EaCH LINE explaining what its doing

Each input expression will be on its own line as shown in the fix.txt file.

The output of each expression should be displayed

The program should terminate when the end of the file

Assume only binary operators and that the expression contain no variables.

Note that you will need to use parentheses to indicate the order of application of the operators in the expression. For example:

Input	Output
78	78
78 6 +	84
78 6 + 9 2 - /	12 ( 78 + 6 ) / ( 9 - 2 )

fix.txt file contains:

78

78 6 +

78 6 + 9 2 - /