Command-line arguments

Command line arguments are passed to main in argc and argv.

argv.c

#include <stdio.h>

int main( int argc, const char **argv ) {
    const char * const is = (argc == 1) ? "is" : "are";
    const char * const it = (argc == 1) ? "it" : "they";
    const char * const s  = (argc == 1) ? ""   : "s";
    const char **p = argv;

    printf( "There %s %d argument%s\n", is, argc, s );

    printf( "And here %s %s\n", it, is );

    while ( *p ) {
        printf( "%s\n", *p );
        p++;
    }
    return 0;
}

$ argv

There is 1 argument
And here it is
code/argv

$ argv foo bar bat

There are 4 arguments
And here they are
code/argv
foo
bar
bat