Menu |
The Structure of Program |
Tips 'n Tricks |
--------------------- Materials : |
The basic structure of a Pascal program is: PROGRAM ProgramName (FileList);
CONST (* Constant declarations *) TYPE (* Type declarations *) VAR (* Variable declarations *) (* Subprogram definitions *) BEGIN (* Executable statements *) END. The elements of a program must be in the correct order, though some may be omitted if not needed. Here's a program that does nothing, but has all the required elements: program DoNothing;
begin end. Comments are portions of the code which do not compile or execute. Pascal comments start with a Turbo Pascal and most other modern compilers support brace comments, such as Commenting makes your code easier to understand. If you write your code without comments, you may come back to it weeks, months, or years later without a guide to why you coded the program that way. In particular, you may want to document the major design of your program and insert comments in your code when you deviate from that design for a good reason. In addition, comments are often used to take problematic code out of action without deleting it. Remember the earlier restriction on nesting comments? It just so happens that braces {} take precedence over parentheses-stars (* *). You will not get an error if you do this: { (* Comment *) }
Whitespace (spaces, tabs, and end-of-lines) are ignored by the Pascal compiler unless they are inside a literal string. However, to make your program readable by human beings, you should indent your statements and put separate statements on separate lines. Indentation is often an expression of individuality by programmers, but collaborative projects usually select one common style to allow everyone to work from the same page. |
You can compile your work by pressing "F9" when in the IDE. Or if you wanna launch it directly after compiling, just press "Ctrl+F9"!! |
..:: by_Zain Fathoni ::..
.: SMA N 1 Jember / XII.Rintisan :.
copyright © 2008
Adapted from www.tayoue.com