[ Solved ] Häufigkeit von IP Adressen zählen in C

#include <stdio.h>
#include <libHX/deque.h>
#include <libHX/string.h>

int main(void)
{
        const struct HXdeque_node *a, *b;
        FILE *fp = fopen("addressen.txt", "r");
        struct HXdeque *dq = HXdeque_init();
        hmc_t *line = NULL;

        while (HX_getl(&line, fp) != NULL) {
                HX_chomp(line);
                HXdeque_push(dq, line);
                line = NULL;
        }

        for (a = dq->first; a != NULL; a = a->next)
                for (b = a->next; b != NULL; b = b->next) {
                        hmc_t *m = a->ptr, *n = b->ptr;
                        printf("%s <=> %s\n", m, n);
                }
        return 0;
}

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

char *readFile(const char *filename);
int writeFile(const char *filename, char *a);
char *strMalloc(unsigned int s);
char *strRealloc(char *a, unsigned int s);

int main(void)
{
    char *a = readFile("readme.txt");
    puts(a);
    return 0;
}

char *readFile(const char *filename)
{
    /* Open a text-file mostly regardless of its size,
       store it in memory and return a char-pointer pointing
       to the memory-adress. */

    FILE *fp;

    char *a;

    char buff[1000];

    int i;

    int size;

    size = 0;

    buff[999] = '\0';

    a = strMalloc(1000);

    if ((fp = fopen(filename, "r")) == NULL)
    {
        puts("Error opening file; probably file not found.");
        exit(1);
    }

    while (!feof(fp))
    {
        for (i = 0; i < 999; i++)
        {
            buff[i] = fgetc(fp);
            size++;
            if (buff[i] == EOF)
            {
                buff[i] = '\0';
                break;
            }
        }

        size++;

        a = strRealloc(a, size);

        strcat(a, buff);
    }

    fclose(fp);

    return a;
}


int writeFile(const char *filename, char *a)
{
    FILE *fp;

    if ((fp = fopen(filename, "w")) == NULL)
    {
        puts("Error writing file.");
        return 1;
    }
        
    fprintf(fp, "%s", a);

    fclose(fp);

    return 0;
}


char *strMalloc(unsigned int s)
{
    /* Allocates memory for a string, testing if allocation has
       been successfull. */

    char *a;
    if ((a = (char *) malloc(s * sizeof(char))) == NULL)
    {
        puts("Error allocating memory.");
        exit(1);
    }

    return a;
}


char *strRealloc(char *a, unsigned int s)
{
    /* Reallocates memory of a string, testing if reallocation has
       been successfull. */

    if ((a = (char *) realloc(a, s * sizeof(char))) == NULL)
    {
        puts("Error reallocating memory.");
        exit(1);
    }

    return a;
}

#!/usr/bin/env python
#-*- coding: iso-8859-1 -*-

import os

f = file("readme.txt", "r")
a = f.readlines()
f.close()

for i in a:
    print i.rstrip("\n")