Chapter 17
Business Applications
In this chapter we turn our attention to business applications. First
we program a sample barchart. Then we use designs from previous
chapters to develop a program that puts the FX through its paces.
The programs pull together many of the programming techniques
that you’ve used in the course of this manual. The second one is con-
siderably longer than the programs in previous chapters, and the
length provides two benefits. First, you’ll have a chance to really test
your own understanding of the FX printer. Second, a longer program
shows you how versatile your printer can be.
Preparation
Load the LINE program you saved at the end of Chapter
16
and
delete lines
1100-1170.
You will use the line graphics characters to
print a sales chart in this chapter.
Barchart
This program creates the barchart shown as Figure
17-1.
It uses the
line graphics characters from the LINE program as well as three new
user-defined characters.
Change
the following lines:
100 LPRINT CHR$(27)"3"CHR$(l0)CHR$(27)"Ul";
130 LPRINT CHR$(27)"&"CHR$(0)CHR$(94)CHR$(l07);
140 FOR Y=l TO 14: LPRINT CHR$(139);
160 NEXT Y: LPRINT CHR$(27)"C"CHR$(33);
Line
100 sets
up line spacing and Unidirectional print. You print in
Unidirectional Mode to be sure
the
line graphics characters line up
precisely.
227
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