44
CHAIN (chain)
Movement of execution from active program
to
program
in
file
Format:
CHAIN" [<device
name>
:]
<filename>
"
Note: Only FDn
or
CMT device name.
Abbreviated form:
CH.
Explanation:
• The execution
of
the program
is
moved from the currently active program to a
different program in the file.
• The
CHAIN
statement
is
also considered to be a file opening.
• Although the
CHAIN
statement has a function similar to the execution of the
RUN
command in a program, the variables, arrays, etc.
of
the original program are
transferred to the new program without change when there
is
a chain.
Example:
1
0
A=l
20
8 =2
30
CHAI
N
"F
D 1
PROG"
40
END
..... The program
of
the file named
"PROG"
on the floppy disk in the floppy disk
drive (drive number 1)
is
executed.
In this instance, the value
of
variables A and B don't change;
A=1,
B=2.
To Next Page
Loading...
