class Customer{
    private:
    string name;
    string phone;
    Customer *next;
    vector<Customer*> clist = {};
    public:
    Customer(string name,string phone = " ",Customer *next = nullptr):
    name(name),phone(phone),next(next){
    }
    string get_name()const{return this->name;}
    string get_phone()const{return this->phone;}
    Customer get_next(){return this->next;}
    void add_customer(){

        cout<<"\nname of customer\t: ";cin >>name;cin.ignore(32000, '\n');
        cout<<"\nphone number: ";cin >>phone;cin.ignore(32000, '\n');
        Customer * c = new Customer{name,phone};
        clist.push_back(c);
     }


    friend ostream& operator<<(ostream &os, const Customer &c);