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If the command is in the same directory, precede the command name with "./". If you are in a different directory, precede the command with the path to the command which could be an absolute path or a relative path:
Sometimes the command might expect you to be in the same directory as the command. One example is alienarena2007:
Somewhere in your menus, you will find "terminal" or something similar. This gives what is sometimes called a "command-line interface" (CLI). Until the early 80s, this was the most common way of interacting with computers.
Once you learn it, you will discover that it is often faster and easier than mousing.
I tried to run fortran 77. I spent five days already and I didn't have a result. I visited forum and got a lot of instructions but nothing works. Probably I made a mistake at the beginning with download rpm package in home directory. I don't understand what is source code, also. You can see my confuse with this problem if you find my messages...
I don't wont to waste your time again. Anyway, if you can give me the whole procedure, stet by step, it probably could help me.
Please put your distro and version in your LQ Profile. The instructions on using your packaging system will vary according to your distro. If I remember correctly you are using SuSE, but I don't know which version.
Is there a reason it has to be Fortran 77? On SuSE 10.3 there is no g77-compat package available, and the -std options are f95, f2003, gnu, or legacy. See the manpage if Legacy would be good enough. There is an option to produce object files compatible with c77. (-ff2c).
If you can enter "which g77" and it is available, then I don't understand what the problem is. If with the -compat package installed gfortran includes a -std f77, then you would compile a program with "gcc -std g77" ...
Also look in the gfortran info page:
1.3 GNU Fortran and G77
The GNU Fortran compiler is the successor to `g77', the Fortran 77
front end included in GCC prior to version 4. It is an entirely new
program that has been designed to provide Fortran 95 support and
extensibility for future Fortran language standards, as well as
providing backwards compatibility for Fortran 77 and nearly all of the
GNU language extensions supported by `g77'.
The GNU Fortran compiler implements ISO/IEC 1539:1997 (Fortran 95). As
such, it can also compile essentially all standard-compliant Fortran 90
and Fortran 77 programs. It also supports the ISO/IEC TR-15581
enhancements to allocatable arrays, and the OpenMP Application Program
Interface v2.5 (http://www.openmp.org/drupal/mp-documents/spec25.pdf)
In the future, the GNU Fortran compiler may also support other
standard variants of and extensions to the Fortran language. These
include ISO/IEC 1539-1:2004 (Fortran 2003).