#include #include #include #include using namespace std; class Human{ private: string name; public: Human(string n) : name(n){} string getName() const {return name;} }; class Child : public Human{ public: Child(string n) : Human(n){} }; class Mom : public Human{ private: list kids; public: Mom(string n) : Human(n){} void Add(Child *ch); friend ostream& operator<<(ostream& os, const Mom& m); ~Mom(); }; void Mom::Add(Child* ch){ if(kids.empty()){kids.push_back(ch);} else if(ch->getName() == "Jack"){ auto found_jack = find_if(kids.begin(), kids.end(), [](Child* ch){ if(ch==nullptr) return false; return ch->getName() == "Jack"; }); if(found_jack != kids.end()){throw "You already have ";} else{kids.push_back(ch);} } else if(ch->getName() == "Sally"){ auto found_jack = find_if(kids.begin(), kids.end(), [](Child* ch){ if(ch==nullptr) return false; return ch->getName() == "Sally"; }); if(found_jack != kids.end()){throw "You already have ";} else{kids.push_back(ch);} } else if(ch->getName() == "Rose"){ for(auto it = kids.begin(); it != kids.end(); ++it){ if((*it)->getName() == "Jack"){ cout << (*it)->getName() << " is kicked out of home, cause he had a problem with Rose:D" << endl; it = kids.erase(it); } } kids.push_back(ch); } } ostream& operator<<(ostream& os, const Mom& m){ os << m.getName() << " has " << m.kids.size() << " kid/s.\n"; m.kids.size() == 0 ? os << "There you go." :os << "Her kid/s is/are: "; for(auto kid : m.kids){ cout << kid->getName() << " "; } os << endl; return os; } Mom::~Mom(){ if(kids.size()>= 1){ kids.clear(); cout << "Anna's family is destructed!" << endl; } else{ cout << "You have no kid mam, no need to delete!" << endl; } } int main(){ Child ch1("Boby"); Child ch2("Jack"); Child ch3("Sally"); Child ch4("Rose"); Mom m("Anna"); try{m.Add(&ch1);} catch(const char* str){cout << str << ch1.getName() << '.' << endl;} try{m.Add(&ch2);} catch(const char* str){cout << str << ch2.getName() << '.' << endl;} try{m.Add(&ch3);} catch(const char* str){cout << str << ch3.getName() << '.' << endl;} try{m.Add(&ch4);} catch(const char* str){cout << str << ch4.getName() << '.' << endl;} cout << m; return 0; }

one-to-many relationship