View difference between Paste ID: WgbUTu9g and GnY7nJhE

 #include <cstdlib>
 #include <iostream>
 #include <string>
 #include <vector>
 #include <algorithm>
 
 using namespace std;
 
 struct date
 {
 	unsigned int day;
 	unsigned int month;
 	unsigned int year;
 
-	bool operator == (const date& d1)const 			/* We overload the == operator for later use */
+	bool month_day_match (const date& d1)const
 	{
 		return ((d1.month == month) && (d1.day == day));
 	};
 };
 
 struct friend_pair
 {
 	date birthdate;
 	string name;
 
 	void print_friend_pair ()
 	{
 		cout << name << ": " << birthdate.day << "/" << birthdate.month << "/" << birthdate.year << endl;
 	};
 	bool operator < (const friend_pair & second)const	/* We overload the < operator for later use */
 	{							/* Orders two dates without paying attention to the year */
-		date fst;
+
-		date snd;
+
 
 		if (birthdate.month < second.birthdate.month)
 		{
-		fst = birthdate;
+
-		snd = second.birthdate;
+		} else if (birthdate.month > second.birthdate.month) {
 			result = false;
-		if (fst.month < snd.month)
+		} else if (birthdate.day <= second.birthdate.day) {
 			result = true;
 		} else {
-		} else if (fst.month > snd.month) {
+
 		}
-		} else if (fst.day <= snd.day) {
+
 	};
 };
 
 class FriendsGroup
 {
 	private:
 	vector<friend_pair> friend_list;
 
 	public:
 	void add_friend (date birthdate, string friend_name)
 	{
 		friend_pair new_friend;
-	int friend_amount;
+
 		new_friend.name = friend_name;
 
 		friend_list.push_back (new_friend);
 	};
-		++ friend_amount;
+
-		friend_list.resize (friend_amount);
+
 		string friend_name;
 		date birthdate;
 
 		cout << "Enter the Name \n";
 		cin >> friend_name;
-		friend_list[friend_amount-1] = new_friend;
+
 		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 show ()
 	{
 		int i;
 		int printing;
 		friend_pair current;
 		friend_pair next;
 
 		if (friend_list.size() == 0)			/* If there are no friends to show, do nothing */
 		{
 			return;
 		}
 
 		std::sort (friend_list.begin(), friend_list.end() );
 
 		printing = 0;
 		current = friend_list[0];
-		if (friend_amount == 0)			/* If there are no friends to show, do nothing */
+		for (i=1; i<friend_list.size(); i++)
 		{
 			next = friend_list[i];
 			if (current.birthdate.month_day_match(next.birthdate) )
 			{
 				current.print_friend_pair ();
 				printing = 1;
 				current = next;
 			} else {
-		for (i=1; i<friend_amount; i++)
+
 				{
 					current.print_friend_pair ();
-			if (current.birthdate == next.birthdate)
+
 					printing = 0;
 				} else {
 					current = next;
 				}
 			}
 		}
 		if (printing == 1)
 		{
 			current.print_friend_pair ();
 		}
 	};
 	FriendsGroup()
 	{
 		friend_list.resize (0);
 	};
 };
 
 int main (void)
 {
 	FriendsGroup people;
 	string status;
 	string input;
-		friend_amount = 0;
+
-		friend_list.resize (friend_amount);
+
 
 	while (status == "Receiving")
 	{
 		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";
 		}
 	}
 
 	return 0;
 }