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Distinguish between FIXEDOVERFLOW and SIZE. DEBUGGING In this section, we will look at additional tools that will help you in the checkout of any PL/I program, as well as in the checkout of those programs responding to the various conditions described in this chapter. The first tool is the PUT DATA statement. PUT DATA Data-directed I/O will be fully discussed in Chapter 7. But you could start using one simple form of this type of I/O now. It consists of the statement: PUT DATA; This statement c...auses all variables known to the program at the point of the PUT statement to be output in the form of assignment statements. (The output resembles the format that comes from using the CHECK feature. ) PUT DATA can be a powerful debugging tool; however, it is at the expense of considerable program overhead. Thus, it should only be used in debugging. In fact, to see just how expensive it is, try running your program without the PUT DATA statement and note the main storage requirements. Then insert the de- sired PUT DATA statement or statements and note the difference in storage requirements.
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