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--- tutorials:pascal [2024/06/11 05:43]
papa
+++ tutorials:pascal [2024/06/20 05:10] (current)
papa [Hello, World!]
@@ Line 1: / Line 1: @@
-====== Pascal ======
+====== The Pascal Compiler ======
-The TWENEX.ORG Pascal compiler was developed by LOTS based on the DECUS PASCAL compiler from Hamburg University.
+The TWENEX.ORG Pascal compiler was originally developed at the
+University of Hamburg as "DECSystem-10 Pascal". The compiler was
+later modified and distributed by Rutgers University with fixes
+and updates contributed by CMU, Stanford, USC, Sandia National
+Laboratories and other sites.
-The compiler can be invoked either with the [[tutorials:compilers|standard compile/load/execute commands]] or directly with ''@PASCAL''. The standard extension for Pascal source files is ''.PAS''.
+The compiler can be invoked either with the [[tutorials:compilers|standard compile/load/execute commands]] or directly with the EXEC command ''PASCAL''. The standard extension for Pascal source files is ''.PAS''.
-Additional information on the LOTS Pascal compiler can be found in ''@HELP PASCAL''.
+===== Hello, World! =====
-(The following reference documents are for the DEC TOPS-20 PASCAL compiler, which is not installed on TWENEX.ORG, not the LOTS compiler. Although the two compilers differ in some respects, the TOPS-20 compiler documents may provide some useful guidance.)
+To create and run a //Hello, World!// program in Pascal:
-===== References =====
+<code>
+[KANKAN] PUBLIC:<~>@ create hello.pas
+</code>
-  * //[[http://bitsavers.org/pdf/dec/pdp10/TOPS20/pascal/AA-L314A-TM_TOPS-20_PASCAL_Primer_Sep83.pdf|TOPS-20 PASCAL Primer]]//, Digital Equipment Corporation, September 1983.
+Your default text editor will start. Enter and save the following:
-  * //[[http://bitsavers.org/pdf/dec/pdp10/TOPS20/pascal/AA-L315A-TM_PASCAL_Language_Manual_Ver_1_Sep83.pdf|TOPS-20 PASCAL Language Manual]]//, Digital Equipment Corporation, September 1983.
+<code>
+(* Hello program in Pascal *)
+program Hello (Output);
+begin
+	writeln ('Hello, World!');
+end.
+</code>
+Return to EXEC then compile and run the program:
+<code>
+[KANKAN] PUBLIC:<~>@ execute hello
+PASCAL:	HELLO
+LINK:	Loading
+[LNKXCT	HELLO execution]
+OUTPUT     :
+Hello, World!
+[KANKAN] PUBLIC:<~>@
+</code>
+  * Syntax of the EXECUTE command is ''EXECUTE //filename//[.//extension//]''. The file extension is optional if you used the standard source file extension (''.PAS'') and there are no other program source files with the same name in your default directory.
+  * At the ''OUTPUT     :'' prompt, press ''Enter'' to direct output to your terminal.
+===== Additional Information =====
+Additional information on the Pascal compiler can be found in ''HELP PASCAL''. (The help file mentions a second Pascal compiler, PASSGO, which is not available on TWENEX.ORG.) Additional documentation is in the following files in directory ''NEO:<DOCUMENTATION>'' (''DOC:''):
+  * PASCAL.DOC
+  * PASCAL.HACKER
+  * PASCAL.INCOMPATIBILITIES-DOC
+  * PASCAL.MEM
+  * PASCAL.UPDATE
+  * PASCAL.USER
+The following is a reference on the ISO Pascal language standard:
+  * K. Jensen and N. Wirth, //[[http://pascal.hansotten.com/uploads/books/Pascal_User_Manual_and_Report_Fourth_Edition.pdf|Pascal User Manual and Report, 4th ed.]]// New York: Springer-Verlag, 1991. [Accessed: 2024/6/20]

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