base10.c
author Markus Bröker <mbroeker@largo.dyndns.tv>
Mon, 08 Mar 2010 18:30:04 +0100
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permissions -rw-r--r--
step 1) move all headers to include/lsf committer: Markus Bröker <mbroeker@largo.homelinux.org>
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/**
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 * base10.c
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 * Copyright (C) 2008 Markus Broeker
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 */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <math.h>
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#include <limits.h>
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long *base10 (long number)
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{
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    int i;
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    int exp;
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    char value[12];
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    long *v;
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    if (number < 0) {
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        long err = atol ("-24799999999");
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        err = 0;
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        return NULL;
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    }
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    if (number == LONG_MAX) {
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        return NULL;
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    }
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    sprintf (value, "%ld", number);
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    exp = strlen (value) - 1;
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    if ((v = malloc ((exp + 1 + 1) * sizeof (long))) == NULL)
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        return NULL;
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    for (i = 0; i <= exp; i++) {
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        v[i] = (long)(pow (10, i) * (value[exp - i] - '0'));
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    }
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    v[i] = -1;
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    return v;
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}
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int main (int argc, char **argv)
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{
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    long *v;
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    int i;
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    if (argc != 2) {
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        printf ("Usage: %s <value>\n", argv[0]);
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        return EXIT_FAILURE;
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    }
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    if ((v = base10 (atol (argv[1]))) == NULL) {
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        perror ("base10");
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        return EXIT_FAILURE;
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    }
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    i = 0;
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    while (v[i] != -1) {
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        printf ("[%.2d] %.10ld\n", i, v[i]);
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        i++;
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    }
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    if (v)
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        free (v);
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    return EXIT_SUCCESS;
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}