issubstr

inline bool issubstr(string t, string ss)
{
    if (t == ss)
        return true;

    int lt, lss;
    lt = t.size();
    lss = ss.size();

    if (lss > lt)
        return false;

    int j = 0;
    for (int i = 0; i < lt && j < lss && lss - j <= lt - i; i++)
        {
            if (ss[j] == t[i])
                j++;
        }
    if (j == lss)
        return true;
    return false;
}