arguments.c

/**
   @file      arguments.c
   @author    Mitch Richling <http://www.mitchr.me/>
   @Copyright Copyright 1996 by Mitch Richling.  All rights reserved.
   @brief     How to access command line arguments from C@EOL
   @Keywords  UNIX ANSI/ISO C command line arguments
   @Std       ISOC

              This is an example program intended to illustrate how to
              access the command line arguments given to a program.
  
              This program is actually ANSI/ISO C, and thus the
              functionality demonstrated is typical of all UNIX
              versions and several non-UNIX operating systems
              including old MacOS, MSDOS, and MS Windows.
  
              As a side note: In old versions of C a third argument to
              main() was used to pass environment variables.  This is
              not allowed in ISO C.  The functions getenv() and
              putenv() provide access to the environment in ISO C.  An
              external variable called environ also provides access to
              the environment.

   @Tested    
              - Solaris 2.8
              - MacOS X.2
              - Linux (RH 7.3)
*/

#include <stdio.h>              /* I/O lib         ISOC  */

int main(int argc, char *argv[]);

int main(int argc, char *argv[]) {
  int i;

  /* argc is always >= 1.  The name of the program is generally argument number 0 */
  printf("Program has %d argument%s (argc==%d).\n", argc-1, (argc != 2 ? "s" : ""), argc);

  for(i = 1; i < argc; i++) {
    printf("Argument #%02d: %s\n", i, argv[i]);
  } /* end for i */

  return 0;
} /* end func main */