fb help2

#include<vector>

bool valid(string i, string s) {
    if (s.size() == 0 || i.size() == 0) {
        cout << "string cannot be empty\n";
        return false;
    }
    if (s.size() > i.size()) {
        cout << "search string > input string\n";
        return false;
    }
    for (auto& l : i) {
        if (l < 97 || l> 122) {
            cout << "bad input string\n";
            return false;
        }
    }
    for (auto& l : s) {
        if ((l < 97 || l> 122) && l!=63) {
            cout << "bad search string\n";
            return false;
        }
    }
    return true;
}

vector<pair<int, string>> searchWild(string i, string s) {
    vector<pair<int, string>> vp{};
    for (int j = 0; j < i.size(); j++) {
        int k = j;
        bool match = true;
        for (auto& l : s) {
            if (k < i.size() && l != i[k] && l != '?') {
                match = false;
                break;
            }
            else if (k == i.size()) {
                match = false;
                break;
            }
            k++;
        }
        if (match) {
            vp.push_back(make_pair(k - s.size(), i.substr(k - s.size(), s.size())));
        }

    }

    return vp;

}

int main() {

    string in{};
    string search{};

    do {
        cout << "enter input string\n";
        cin >> in;
        cout << "enter search string\n";
        cin >> search;
    } while (!valid(in, search));

    auto v = searchWild(in, search);

    for (auto& i : v) {
        cout << "index = " << i.first << " string = " << i.second << '\n';
    }

}