FLSG620DA Users' Note | http://www.csar.cfs.ac.uk/test/software/maths/nag/mark20... |
their use is recommended in preference to writing your own declarations.
The NAG Fortran Library Interface Block files are organised by Library chapter. The module names are:
nag_f77_a_chapter nag_f77_c_chapter nag_f77_d_chapter nag_f77_e_chapter nag_f77_f_chapter nag_f77_g_chapter nag_f77_h_chapter nag_f77_m_chapter nag_f77_p_chapter nag_f77_s_chapter nag_f77_x_chapter
These are supplied in
In order to make use of these modules from existing Fortran 77 code the following changes need to be made:
Add a USE statement for each of the module files for the chapters of the NAG Fortran Library that your program calls directly. Often only one USE statement will be required.
Delete all EXTERNAL statements for NAG Fortran Library routines. These are now declared in the module(s).
Delete the type declarations for any NAG Fortran Library functions. These are now declared in the module(s).
These changes are illustrated by showing the conversion of the Fortran 77 version of the example program for NAG Fortran Library routine S18DEF. Please note that this is not exactly the same as the example program that is distributed with this implementation. Each change is surrounded by comments boxed with asterisks.
*S18DEF Example Program Text
*Mark 14 Revised. NAG Copyright 1989.
*******************************************************************
* Add USE | statement for relevant chapters | * |
USE | NAG_F77_S_CHAPTER |
|
**
*******************************************************************
*.. Parameters ..
INTEGER | NIN, NOUT |
PARAMETER | (NIN=5,NOUT=6) |
INTEGER | N |
PARAMETER | (N=2) |
*.. Local Scalars ..
COMPLEX*16 Z DOUBLE PRECISION FNU
INTEGER | IFAIL, NZ |
CHARACTER*1 | SCALE |
*.. Local Arrays ..
COMPLEX*16 CY(N)
*.. External Subroutines ..
*******************************************************************
*EXTERNAL declarations need to be removed (and type declarations *
* | for functions). | * |
C | EXTERNAL | S18DEF |
* |
| * |
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