getopt() problems.......

Hi there....
I'm trying to become more framiliar with structured programming. I have a problem with an encryption program I'm creating.....
I'm allowing command line arguments to be passed to main(), and using getopt() to allow the dash(-) option and argument following the option...
I'm about 1/4 of the way finished, it compiles fine, but when I run it, I can not specify arguments with correct results... If you could, if it's not too much of a hasle, please compile/download attatchment....
Thanks in advance.
Here is my code so far:

Code:

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#include <stdio.h>
#include <unistd.h>

FILE *in;

char usage(char *name);
char infile(char *arg1);

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

        char c;


        if (argc < 4) {
                usage(argv[0]);
                return (1);
        }

       
        while((c = getopt(argc, argv, "i:o:k:")) != EOF) {

        switch (c) {

                case ('i') : infile(argv[1]);
                                break;
        }
               
       
               
        }
       

}

char usage(char *name) {

        printf("Usage:\t%s -i [infile] -o [outfile] -k [key]\n", name);
        return;
}

char infile(char *arg1) {

        if ((in = fopen(arg1, "r")) == NULL) {
                printf("There was an error opening \"%s\"\n", arg1);
                exit(1);
       
        }

}

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I've never used getopt(), and it's not standard.

The way I get the command-line arguments is simply:

Code:

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int parm = 1;
while (parm < argc)
{
    if (argv[parm][0] == '-')
    {          // it's a switch
        switch (toupper(argv[parm][1]))
        {
            case 'I':        // input switch?
                break;
            case 'O':        // output switch?
                break;
        }
    }
    else
    {          // it's not a switch
    /* do something else */
    }
    parm++;    // next parameter
}

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Code:

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case ('i') : infile(optarg);

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