Command line argument in fortarn 77

Thread starter Manojg
Start date May 27, 2012
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Argument Line

In summary, a command line argument in Fortran 77 is an input provided to a program during execution, allowing the user to specify information or instructions. These arguments can be passed using the "command_argument_count" and "get_command_argument" functions, and multiple arguments can be passed by separating them with spaces. Common uses for command line arguments include specifying input data or parameters and controlling program flow. However, there are limitations such as a character limit and the need to know the format and number of arguments beforehand.

May 27, 2012

Manojg

Hi,

How can I pass command line argument in FORTRAN 77, like in C/C++?

Thanks.

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May 27, 2012

Well_InTheory

(at least in Intel's compiler, specifically f90) I use

call getarg(1,buffer)
read(buffer,*) variable

to read from the input, i.e.

$ ./my_program abc

to set 'variable' to abc.

http://software.intel.com/sites/pro...compiler_f/lref_for/source_files/rfgetarg.htm

1. What is a command line argument in Fortran 77?

A command line argument in Fortran 77 is an input given to a program when it is executed. It allows the user to provide specific information or instructions to the program, such as input data or parameters, without having to manually input them during runtime.

2. How do I pass command line arguments to a Fortran 77 program?

To pass command line arguments to a Fortran 77 program, you can use the "command_argument_count" and "get_command_argument" functions. The first function is used to determine the number of arguments passed, while the second function is used to retrieve the actual arguments.

3. Can I pass multiple command line arguments to a Fortran 77 program?

Yes, you can pass multiple command line arguments to a Fortran 77 program by separating them with spaces when executing the program. These arguments will be stored in separate variables within the program, based on the order in which they were passed.

4. What are some common uses of command line arguments in Fortran 77?

Command line arguments in Fortran 77 are often used to specify input data or parameters for the program, such as file names or numerical values. They can also be used to control the flow of the program, by providing options for different actions or outputs.

5. Are there any limitations to using command line arguments in Fortran 77?

One limitation of using command line arguments in Fortran 77 is that they are limited to a certain number of characters, typically around 255. Additionally, the number and format of the arguments must be known beforehand, as there is no way to dynamically allocate or read in command line arguments.