a fibonacci sequence generator written in C

// ----------------------------------------------------------------------------
// "THE BEER-WARE LICENSE" (Revision 43):
// <[email protected]> wrote this file. As long as you retain this notice you
// can do whatever you want with this stuff. If we meet some day, and you think
// this stuff is worth it, you can buy me a beer in return Aaron R. Yool
// ----------------------------------------------------------------------------

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>

typedef enum{false, true = !false} bool;

usage(const char *name)
{
    printf("Usage: %s <starting number> <number of iterations>\n", name);
    exit(-1);
}

main(unsigned int count, const char **args)
{
    long double i, a = 0, b = 0, c = 0;
    if(count == 3 ? (args[1][0] >= '0' && args[1][0] <= '9') || (strlen(args[1])>1 ? (args[1][0] == '-' && args[1][1] >= '0' && args[1][1] <= '9') : true) : false)
        b = atoll(args[1]);
    else
        usage(args[0]);

    if(count == 3 ? (args[2][0] >= '0' && args[2][0] <= '9') || (strlen(args[2])>1 ? (args[2][0] == '-' && args[2][1] >= '0' && args[2][1] <= '9') : true) : false)
        i = atoll(args[2]);
    else
        usage(args[0]);

    for(i;i > 0;--i)
    {
        c = a;
        a = a+b;
        b = c;
        if(isinf(a))
        {
            printf("\n\nWe had to stop here: %.0LF\n", i);
            exit(-1);
        }
        i != 1 ? printf("%.0LF, ", a) : printf("%.0LF\n", a);
    }

    return;
}