getline

char *getline(istream& in)
{
    const int BUF_LEN = 50;

    int len = BUF_LEN;
    int i = 0;

    char * str = (char*)malloc(BUF_LEN * sizeof(char)), c;

    while (in.get(c) && c != '\n')
    {
        if (i == len)
        {
            str = (char*)realloc(str, len += BUF_LEN);
        }
        str[i++] = c;
    }

    char * rez = new char[i + 1];
    for (int j = 0; j < i; ++j)
    {
        rez[j] = str[j];
    }
    rez[i] = 0;

    free(str);
    return rez;
}