F. K. Kong MA, MSc, PhD, CEng, FICE, FIStructE, R. H. Evans CBE, DSc, D ès Sc, DTech, PhD, CEng, FICE, FIMechE, FIStructE (auth.)-Reinforced and Prestressed Concrete-Springer US (1987)

How to run the programs 469
numbers with Label numbers. For example, Line 116 says that if
BETAB (which stands for {Jb as explained in Table 12.1-1) is less
than or equal to 0.9, go to Label100. Label100 occurs on Line 119.
The Label number is for the computer's internal use; the Line
number is purely for the convenience of the human user of the
program.
(c) The Main Program is always initialized by a Subroutine INIT ( =
INITialization) which reads in the input data. See, for example, Lines
36-40.
(d) The Main Program always ends by calling the Subroutine RESULT
to output the results. See, for example, Lines 71-76.
(e) All variables are explicitly declared. With reference to Line 32, for
example, readers familiar with FORTRAN [4] will realize that the
variables AS, ASDASH, etc. need not have been declared. However,
on balance it is much better to declare all of them.
(f) All the variables in the Main Program and the Subroutines are listed
alphabetically and explained in a table, which appears at the end of
the program (through it does not form part of the program). See, for
example, Table 12.1-1.
12.1(d)
How to run the programs
The programs are written to interact with the user. That is, they assume
that the input comes from the keyboard and the output goes to the screen.
Suppose the user has purchased (see Section 12.1(a) and Appendix 1) the
set of two floppy disks:
(1) The first disk (Disk I) contains all the programs listed in this chapter
in the form of 'source files'. A source-file name is the program name
plus' .FOR'. Thus, the program BMBRSR (of Fig. 12.1-2 and Section
12.4(a)) will be stored under the source-file name BMBRSR.FOR.
Similarly, any other program such as NMDDOE of Section 12.2(a)
will be stored under the source-file name NMDDOE.FOR.
(2) The second disk (Disk II) contains the so-called executable files of all
the source files of Disk I. Briefly, an executable file is the source file
stored in machine code, ready for execution. An executable-file name
is simply the program name plus '.EXE'. Thus the executable-file
name for the program BMBRSR will be BMBRSR.EXE, that for the
program NMDDOE will be NMDDOE.EXE and so on. That is:
Program name
BMBRSR
NMDDOE
etc.
Source-file name
BMBRSR.FOR
NMDDOE.FOR
Executable-file name
BMBRSR.EXE
NMDDOE.EXE
Suppose the user wants to run the program BMBRSR of Fig. 12.1-2 (and
Section 12.4(a)). The procedure is simple [2]: