The following programs demonstrate the use of the FOR statement
    to create a record stream. These programs:

    o  Declare a variable dept_code

    o  Prompt for a value for dept_code

    o  Start a READ_ONLY transaction

    o  Create a record stream defined by a record selection
       expression that uses the value of dept_code

    o  Display the department name for each record in that stream

    The C program uses the read_string function to prompt for and
    receive a value for dept_code. For more information on this
    function, see Appendix B of the "RDML Reference Manual".