Page 275 - Compact Numerical Methods For Computers

262 Compact numerical methods for computers
The files which end in an ‘X.’ contain information to control the drivers, in fact, they
contain the names of the EX*.CNM control files. This facility is provided to allow
for very rapid testing of all the codes at once (the technical term for this is ‘regression
testing’). Note that console image files having names of the form OUT0102 are
created, which correspond in form to the driver names, i.e. DR0102.PAS. The
command line files present on the disk are:

DR0102X. DR03AX. DR03X. DR04X. DR0506X. DR0708X.
DR09X. DR10X. DR13X. DR14X. DR15X. DR1617X.
DR1618X. DR19X. DR21X. DR22X. DR23X. DR24IIX.
DR24LEX. DR24LSX. DR25X. DR26X. DR27X.

Users may wish to note that there are a number of deficiencies with version 3.01 a of
Turbo Pascal. I have experienced some difficulty in halting programs with the
Control-C or Control-Break keystrokes, in particular when the program is waiting
for input. In some instances, attempts to halt the program seem to interfere with the
files on disk, and the ‘working’ algorithm file has been over-written! On some
occasions, the leftmost characters entered from the keyboard are erased by READ
instructions. From the point of view of a software developer, the absence of a facility
to compile under command of a BATch command file is a nuisance. Despite these
faults, the system is relatively easy to use. Many of the faults of Turbo Pascal 3.01a
have been addressed in later versions of the product. We anticipate that a diskette of
the present codes adapted for version 5.0 of Turbo Pascal will be available about the
time the book is published. Turbo Pascal 5.0 is, however, a much ‘larger’ system in
terms of memory requirements.