[C++] issues with switch() statement

void info::get_factorio_version(string* factorio_version){
    bool loop = true;
    while(loop){
    cout << "What version of Factorio is this mod for?" << endl;
    cout << "   1 - 0.14.xx" << endl;
    cout << "   2 - 0.13.xx" << endl;
    cout << "   3 - 0.12.xx or earlier" << endl;
    cout << "Your selection: ";
    int select; cin >> select;
    switch(select){
        case '1': {
            *factorio_version = "0.14";
            cout << "\n\n";
            loop = false;
            } break;
        case '2': {
            *factorio_version = "0.13";
            cout << "\n\n";
            loop = false;
            } break;
        case '3': {
            *factorio_version = "NULL";
            cout << "\n\n";
            loop = false;
            } break;
        default: {
            cout << "\n\nInvalid response.\n\n";
            } break;}}}

string selectSTR; cin >> stringSTR;
int selectINT = atoi(selectSTR);

string selectSTR; cin >> stringSTR;
char selectCHAR = selectSTR.c_str();