Chapter
10
I
BASIC
Keywords
MERGE
Statement
MERGE
pathname
Loads
a
BASIC
program and merges it with the program cur-
rently in memory.
Pathnume
is
a
standard file specification
as
described in Chapter
1.
The filename
is
required. The file must be in ASCII format;
that is,
it
must have been saved with the A option.
Program lines in
pathname
are inserted into the resident pro-
gram in sequential order. For example, suppose that
3
lines from
pathname
are numbered
75,
85,
and 90, and
3
lines from the
resident program are numbered 70,
80,
and 90. When you use
MERGE on the
2
programs, this portion of the merged program
is now numbered 70, 75,
80, 85,
90.
If line numbers
on
the new program coincide with line numbers
in the resident program, the new program's lines replace the res-
ident program's lines.
MERGE closes all files and clears all variables. Upon completion,
BASIC returns
its
prompt.
Example
Suppose you have a BASIC program on disk,
prog2.M
(saved in
ASCII), that you want
to
merge with the program you have in
memory:
MERGE
"prog2.
txt"
merges the
2
programs.
216
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