This modification introduces the following enhancements to the mfconvert.cbl sample program:
Return value - The mfconvert program now returns a value of 0 if the conversion was successful, 1 if it failed for a generic issue, or the COBOL status code if a COBOL error occurred.
Usage display - The mfconvert program now displays a usage message if it is run with fewer than 2 command-line parameters.
