CHAPTER 16

image

Creating Large Systems

All the programs you have seen so far in this book have been small stand-alone programs. But a large software system is not usually written as a single monolithic program. Instead, it consists of a main program and many independently compiled subprograms, linked together to form one executable run-unit. In COBOL, a program that is invoked from another program is called a subprogram. In other languages, these might be called procedures or methods.

This chapter shows you how to create a software system that consists of a number of programs linked together into one executable run-unit. You see how to create contained ...

Get Beginning COBOL for Programmers now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.