void *Malloc(size_t size)
{
    void *ptr;

    if ((ptr = (void *) malloc(size)) == NULL)
    {
        perror("malloc");
        exit(1);
    }
    return ptr;
}


void *Realloc(void *ptr, size_t numMembers)
{
     void *newptr;

     if ((newptr = (void *) realloc(ptr, numMembers)) == NULL)
     {
         perror("Realloc");
         exit(1);
     }
     return newptr;
}

 
void *Calloc(size_t numMembers, size_t size)
{
    void *ptr;

    if ((ptr = (void *) calloc(numMembers, size)) == NULL)
    {
        perror("malloc");
        exit(1);
    }
    return ptr;
}


FILE *Fopen(char *file, char *mode)
{
    FILE *fp;

    if ((fp = fopen(file, mode)) == NULL)
    {
         printf("Fopen error on %s!\n", file);
         exit(1);
    }
    return fp;
}


void Fclose(FILE *fp)
{
    if (fclose(fp) != 0)
    {
        printf("Fclose failed!\n");
        exit(1);
    }
}