TOPS-20 PASCAL Language Manual - Bitsavers

USING PASCAL ON TOPS-20
8.6 EXECUTING A PROGRAM
After you have compiled and linked your program, you can execute the
object file with the START command; or you can save the file with the
SAVE command, and then execute it with the RUN command.
You ~an save time by using the EXECUTE command. The EXECUTE command
acts by performing a LOAD command (which may start with a COMPILE
command) followed immediately by a START command. So, instead of
performing severa] separate steps of running the compiler, compiling
your program, loading your program, and starting your program, you can
compile, load, and start your program with a singJe command:
(~EXECUTE f i 1 ename ~)
Using the EXECUTE command does not save the executable image of the
object file. The SAVE command stores a copy of the executabJe image
in an executable file. The default file type that is created is EXE.
After an executable image is saved, you can execute it with the RUN
command. The SAVE and RUN commands have the form:
(~~~AVE f i 1 ename ~
@f~UN f i 1 ename ~
You must specify the file name; default values are
omit optional elements of the file specification.
type is EXE.
appl ied if you
Th e d e fa u] t f i 1 e
8.7 EXAMPLES
Example 1
(~F'ASCAL..
PASCAL> ~:;()HTEf~
PASCAI...:>/EXIT
@EXE SnRTEf~
/NOFLAG/L.. I ST I NG
This example uses the PASCAL command to compile the source
SORTER. The /NOFLAG switch prevents display of messages
nonstandard PASCAL statements in the program; the /LISTING
generates a .LST file of the compilation in your disk area.
Example 2
@.PASCAL.
PASCAL:>MERGER/DEBUG
F'ASCAI, .. >/EX I T
@.LOAD MERGER/DEBUG
@DEBUG MERGER
f i] e
about
switch
The PASCAL command is used to compile the program with the debugger,
PASDDT. The DEBUG command is used to load the compiled program and
the PASCAL debugger automatically. The DEBUG command executes the
program with PASDDT.
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