What's wrong with this code ? (Runtime Error although it works fine on codeblocks) "Whats in the name"

ness · July 21, 2017, 9:22pm

using namespace std;

int main()
{
short T;
cin >> T;

short i = 0;
string str[100];

cin.ignore();
while(i++ < T)
    getline(cin, str[i]);

string tmp;
vector <string> v;
i = 0;
while(i++ < T)
{
    v.clear();
    stringstream ss(str[i]);
    while(ss >> tmp)
        v.push_back(tmp);

    for(auto &w : v)
    {
        if(w.size() == 1)
        {
            LOOP:
            cout << (char)toupper(w[0]);
            for(unsigned short j=1; j<w.size(); j++)
                cout << (char)tolower(w[j]);
            cout << endl;
        }
        else
        {
            if(&w != &v.back())
                cout << (char)toupper(w[0]) << "." << ends;
            else
                goto LOOP;
        }
    }

}

    return 0;
}