asd

int main() {    string d = "asd";    while (d == "asd"){        string d = "asd";        cout << "\nMita haluat laskea? \n(1)ympyran kehan \n(2)ympyran halkaisijan \n(3)ympyran pinta-alan\n";        cout << "(0)poistu ohjelmasta\n";        cin >> d;        if (d == "1"){keh(); d = "asd";}        if (d == "2"){hal(); d = "asd";}        if (d == "3"){pa(); d = "asd";}        }           }