Ej6C++

#include <cstdlib>
#include <iostream>
#include <string>
#include <vector>
#include <algorithm>

using namespace std;

typedef struct {
    unsigned int day;
    unsigned int month;
    unsigned int year;
} date;

typedef struct {
    date birthdate;
    string name;
} friend_pair;

void print_friend_pair (friend_pair current) {
    cout << current.name << ": " << current.birthdate.day << "/" << current.birthdate.month << "/" << current.birthdate.year << endl;
}

bool date_order (friend_pair first, friend_pair second) {       /* Orders two dates without paying attention to the year */
        date fst;
        date snd;

        bool result;

        fst = first.birthdate;
        snd = second.birthdate;

        if (fst.month < snd.month) {
            result = true;
        } else if (fst.month > snd.month) {
            result = false;
        } else if (fst.day <= snd.day) {
            result = true;
        } else {
            result = false;
        }
        return result;
}

class FriendsGroup {
    private:
    vector<friend_pair> friend_list;
    int friend_amount;
    bool equal_date (friend_pair first, friend_pair second) {   /* Checks if the day and month of two dates coincide */
        date fst;
        date snd;

        fst = first.birthdate;
        snd = second.birthdate;

        return (fst.month == snd.month && fst.day == snd.day);
    };
    public:
    void add_friend (date birthdate, string friend_name) {
        ++ friend_amount;
        friend_list.resize (friend_amount);

        friend_pair new_friend;
        new_friend.birthdate = birthdate;
        new_friend.name = friend_name;

        friend_list[friend_amount-1] = new_friend;
    };
    void get_new_friend () {
        string friend_name;
        date birthdate;

        cout << "Enter the Name \n";
        cin >> friend_name;

        cout << "Enter the Date, separated by spaces (dd mm yyyy) \n";
        cin >> birthdate.day >> birthdate.month >> birthdate.year;

        while (birthdate.day > 31 || birthdate.month > 12) {
            cout << "Please input the date again, separated by spaces (dd mm yyyy) \n";
            cin >> birthdate.day >> birthdate.month >> birthdate.year;
        }

        add_friend (birthdate, friend_name);

    };
    void initialize () {
        friend_amount = 0;
    };
    void show () {

        int i;
        int printing;
        friend_pair current;
        friend_pair next;

        std::sort (friend_list.begin(), friend_list.end(), date_order);

        printing = 0;
        current = friend_list[0];
        for (i=1; i<friend_amount; i++) {
            next = friend_list[i];
            if (equal_date(current, next) ){
                print_friend_pair (current);
                printing = 1;
                current = next;
            } else {
                if (printing == 1) {
                    print_friend_pair (current);
                    current = next;
                    printing = 0;
                } else {
                    current = next;
                }
            }
        }
        if (printing == 1) {
            print_friend_pair (current);
        }
    };
};

int main (void) {
    FriendsGroup * people;
    people = new (FriendsGroup);
    string status;
    string input;

    status = "Recieving";

    while (status == "Recieving") {
        cout << "Choose your action: Add, Show, Exit \n";
        cin >> input;

        if (input == "Exit") {
            status = "Exit";
        } else if (input == "Show") {
            people -> show();
        } else if (input == "Add") {
            people -> get_new_friend ();
        } else {
            cout << "That is not a valid input \n";
        }
    }

    delete (people);

    return 0;
}