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- Chapter 16 - Complete example programs
-
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- The intent of this chapter is to give several example
- programs that use nearly every capability of Modula-2 as
- illustrations of large usable programs. The programs are
- usable utilities, but primarily they are intended to
- illustrate the method of building up a medium sized program
- from the various constructs studied in the earlier chapters.
-
- BAKLIST.MOD
-
- This program generates a list of all files along with
- their subdirectories. Some files are excluded from the list,
- including all three files that comprise the DOS system and
- the file generated here, FULLDISK.LST. This is an ASCII
- file that can be edited with any text editor to eliminate
- any files that you do not wish to back up. It should be
- noted that the file, FULLDISK.LST, is created and filled in
- the root directory of the default drive.
-
- Select the desired subdirectory that you wish to back
- up, and the files, subdirectories, and all of their
- respective contents will be listed in FULLDISK.LST. The
- resulting list is then used by BAKCOPY to actually copy the
- files to a floppy disk.
-
- BAKCOPY.MOD
-
- This program uses FULLDISK.LST to actually copy the
- files from the source disk to the target and requests a disk
- change whenever the floppy disk fills up. It will not copy
- a file larger than that which will fit on one disk, but will
- give a message of which files are not copied.
-
- BAKRSTR.MOD
-
- This program will read the files from floppy back to
- the fixed disk to restore it. It simply copies from
- whatever directory they are in to the corresponding
- directory on the fixed disk, creating the directory if
- necessary.
-
- DIRHELPS.DEF DIRHELPS.MOD
-
- This global module contains several useful file
- handling and directory manipulation procedures. It is
- called by the above three example programs used for backup
- and restore of a fixed disk. These routines are available
- for your use also if you desire to use them for a file
- manipulation program. Their main intent however is that
- they be a guide for the student to observe methods used to
- write library functions.
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- Page 99
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- Chapter 16 - Complete example programs
-
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- BITOPS.DEF BITOPS.MOD
-
- This module has several generic bit operations such as
- logical AND, OR, etc. and shift operations. These are
- useful procedures that you can import and use in your
- programs if you are doing bit manipulations.
-
- REAL2MON.DEF REAL2MON.MOD
-
- This module has a procedure to output REAL data to the
- monitor in a neat, easy to read format. It is documented in
- the header of the source files.
-
- REAL2FIL.DEF REAL2FIL.MOD
-
- This module has several procedures to output REAL and
- other data type to a file using the FileSystem MODULE. The
- various procedures are documented in their respective
- headers.
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- Page 100
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