In Hour 3, “Different Data Types,” you learned about the various types of fields available in a COBOL program and a little bit about how to use them. The data used by your COBOL programs is useful only when presented to an end user, the person for whom your program was written. To that end, some interface with the user must exist. This hour focuses on aspects of the user interface, including
• Definitions of and the differences between batch and interactive processing
• Using the keyboard and screen to interface with the user
• Using the COBOL
Screen Section to interact with the user
You cannot create a useful program unless you are able to interact with the user. Your user may be a person ...