args, a FORTRAN90 code which demonstrates command line argument retrieval.
In particular, the code is a demonstration of the IARGC and GETARG routines, commonly available on UNIX systems.
These routines allow a FORTRAN program to count and retrieve the command line arguments with which it was invoked. Thus, if an executable program is called fu and we invoke it with the command
fu man chuthen IARGC will return the value 2, and GETARG, with an input of 0, 1 or 2, will return the values fu, man or chu.
The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.
args is available in a C version and a C++ version and a FORTRAN90 version and a MATLAB version and a Python version.
GFORTRAN_INTRINSICS, a FORTRAN90 code which demonstrates the use of intrinsic programs provided by the GFORTRAN compiler, which include versions of IARGC and GETARG.