bool lookup(string s) { // TODO int start = 0; int end = dictionary.size;

while (start <= end)
{
    int mid = (start + end) / 2;

    if (strcmp(s, dictionary.words[mid].letters) == 0)
    {
        dictionary.words[mid].found = true;
        return true;
    }
    if (strcmp(s, dictionary.words[mid].letters) < 0)
    {
        end = mid - 1;
    }
    if (strcmp(s, dictionary.words[mid].letters) > 0)
    {
        start = mid + 1;
    }
}
return false;
}