`#ifndef SOCIALNETWORK_H_INCLUDED
#define SOCIALNETWORK_H_INCLUDED
#include <string>
#include <vector>

class User;
class Post;
class PublicPost;
class PrivatePost;
class TimeLine;

class Post{

        //User taggedFriend;
    public:
        std::string content;
        Post();
        void set_content(std::string content);
        std::string get_content();
        virtual void PostOnFreindsWall(){};
        virtual void PostOnNewsFeed(){};
};

class PublicPost : public Post{
    public:
        PublicPost();
        void PostOnNewsFeed();
};

class PrivatePost : public Post{
    public:
        PrivatePost();
        void PostOnFriendsFeed(User &taggedFriend);
};

class TimeLine{

    public:
        std::vector <Post> posts;
        TimeLine();
        void ClearTimeLine ();
        void DisplayTimeLine ();
};

class User{
    private:
        std::string dateOfBirth;
        int postCode;
        std::string gender;
        std::string email;
        std::string country;
        std::string city;
        std::string userName;
        std::string password;
    public:
        TimeLine timeline;
        Post myPost;
        std::string firstName;
        std::string lastName;
        std::vector <User> friends;
        User();
        void setInfo();
        std::string get_firstName() const;
        std::string get_lastName() const;
        std::string get_dateOfBirth() const;
        int get_postCode() const;
        std::string get_gender() const;
        std::string get_email() const;
        std::string get_country() const;
        std::string get_city() const;
        std::string get_userName() const;
        std::string get_password() const;
        void displayUserDetails() const;
        void updateUserDetails();
        void add_friend(User& add);
        bool check_if_friend(User& check);
};


#endif // SOCIALNETWORK_H_INCLUDED
`

#include <iostream>
#include <cstdlib>
#include <string>
#include <vector>
#include "SocialNetwork.h"

using namespace std;

Post::Post()
{
    content ="nothing";
}
void Post::set_content(string content1)
{
    content=content1;
}
string Post::get_content()
{
    return content;
}

PublicPost::PublicPost()
{
}
void PublicPost::PostOnNewsFeed()
{
    TimeLine.posts.push_back(content);
}

PrivatePost::PrivatePost()
{
}
void PrivatePost::PostOnFreindsWall(User &taggedFriend)
{
    taggedFriend.timeline.posts.push_back(content);
}

TimeLine::TimeLine()
{
}

void TimeLine::DisplayTimeLine()
{
    for(int i=0; i<posts.size();i++){
        cout<<posts[i].content<<endl;
    }
}
void TimeLine::ClearTimeLine()
{
    for(int i=0; i<posts.size();i++){
        posts.pop_back();
    }
}


void*/

User::User()
{
    firstName="none";
    lastName="none";
    dateOfBirth="none";
    postCode=0;
    gender="none";
    email="none";
    country="none";
    city="none";
    userName="none";
    password="none";
    cout<<"in user constructor";
}

void User::setInfo()
{
    string firstName1;
    cout<<"Enter first name"<<endl;
    cin>>firstName1;
    firstName = firstName1;
    string lastName1;
    cout<<"Enter last name"<<endl;
    cin>>lastName1;
    lastName = lastName1;
    string dateOfBirth1;
    cout<<"Enter date of birth in format dd/mm/yy"<<endl;
    cin>>dateOfBirth1;
    dateOfBirth = dateOfBirth1;
    int postCode1;
    cout<<"Enter post code"<<endl;
    cin>>postCode1;
    postCode = postCode1;
    string gender1;
    cout<<"Enter gender"<<endl;
    cin>>gender1;
    gender = gender1;
    string email1;
    cout<<"Enter email"<<endl;
    cin>>email1;
    email = email1;
    string country1;
    cout<<"Enter country"<<endl;
    cin>>country1;
    country = country1;
    string city1;
    cout<<"Enter city"<<endl;
    cin>>city1;
    city = city1;
    string userName1;
    cout<<"Enter User name"<<endl;
    cin>>userName1;
    userName = userName1;
    string password1;
    cout<<"Enter password"<<endl;
    cin>>password1;
    password = password1;
}

string User::get_firstName() const
{
    return firstName;
}
string User::get_lastName() const
{
    return lastName;
}

string User::get_dateOfBirth() const
{
    return dateOfBirth;
}

int User::get_postCode() const
{
    return postCode;
}

string User::get_gender() const
{
    return gender;
}

string User::get_email() const
{
    return email;
}

string User::get_country() const
{
    return country;
}

string User::get_city() const
{
    return city;
}

string User::get_userName() const
{
    return userName;
}

string User::get_password() const
{
    return password;
}

void User::displayUserDetails() const
{
    cout<<"Name: "<<firstName<<" "<<lastName<<endl;
    cout<<"Date of Birth: "<<dateOfBirth<<endl;
    cout<<"Post Code: "<<postCode<<endl;
    cout<<"Gender: "<<gender<<endl;
    cout<<"Email: "<<email<<endl;
    cout<<"Country: "<<country<<endl;
    cout<<"City: "<<city<<endl;
}

void User::updateUserDetails()
{
    int a;
    cout<<"Select which information you want to update"<<endl;
    cout<<"1.First Name"<<endl;
    cout<<"2.Last Name"<<endl;
    cout<<"3.Date of Birth"<<endl;
    cout<<"4.Post Code"<<endl;
    cout<<"5.Gender"<<endl;
    cout<<"6.Email"<<endl;
    cout<<"7.Country"<<endl;
    cout<<"8.City"<<endl;
    cout<<"9.Change password"<<endl;
    cin>>a;
    if(a==1){
        string b;
        cout<<"Enter first name: ";
        cin>>b;
        firstName=b;
    }
    if(a==2){
        string b;
        cout<<"Enter last name: ";
        cin>>b;
        lastName=b;
    }
    if(a==3){
        string b;
        cout<<"Enter date of birth: ";
        cin>>b;
        dateOfBirth=b;
    }
    if(a==4){
        int b;
        cout<<"Enter post code: ";
        cin>>b;
        postCode=b;
    }
    if(a==5){
        string b;
        cout<<"Enter gender: ";
        cin>>b;
        gender=b;
    }
    if(a==6){
        string b;
        cout<<"Enter email: ";
        cin>>b;
        email=b;
    }
    if(a==7){
        string b;
        cout<<"Enter country: ";
        cin>>b;
        country=b;
    }
    if(a==8){
        string b;
        cout<<"Enter city: ";
        cin>>b;
        city=b;
    }
    if(a==9){
        string b;
        cout<<"Enter new password: ";
        cin>>b;
        password=b;
    }
}


void User::add_friend(User &add)
{
    friends.push_back(add);
    for(int i=0;i<friends.size();i++)
        cout<<friends[i].firstName<<endl;
}

bool User::check_if_friend(User& checkfriend)
{
    bool if_friend=false;
    for(int i=0; i<friends.size(); i++)
    {
        if(checkfriend.firstName==friends[i].firstName)
        {
            cout<<"Yes "<<checkfriend.firstName<<" is your friend" <<endl;
            if_friend = true;
            break;
        }
    }
    if(if_friend==false)
    {
        cout<<"No "<<checkfriend.firstName<<"is not your friend"<<endl;
    }
    return if_friend;

}

#include <iostream>
#include "SocialNetwork.h"

using namespace std;

//User AllUsers[10];

int main()
{
    cout<<endl;
    User Superman;
    User Batman;
    User Deadpool;
    User Spiderman;
    cout<<endl;
    cout<<"USER INFORMATION FOR FIRST USER"<<endl;
    Superman.setInfo();
    cout<<endl;
    cout<<"USER INFORMATION FOR SECOND USER"<<endl;
    Batman.setInfo();
    cout<<endl;
    cout<<"USER INFORMATION FOR THIRD USER"<<endl;
    Deadpool.setInfo();
    cout<<endl;
    cout<<"USER INFORMATION FOR FOURTH USER"<<endl;
    Spiderman.setInfo();

    //Making all 4 users friends of each other
    Batman.add_friend(Superman);
    Batman.add_friend(Deadpool);
    Batman.add_friend(Spiderman);
    Superman.add_friend(Batman);
    Superman.add_friend(Deadpool);
    Superman.add_friend(Spiderman);
    Deadpool.add_friend(Batman);
    Deadpool.add_friend(Superman);
    Deadpool.add_friend(Spiderman);
    Spiderman.add_friend(Superman);
    Spiderman.add_friend(Deadpool);
    Spiderman.add_friend(Batman);

    Post newPost;
    newPost.set_content("Hello");
    Superman.myPost = newPost;
    Superman.myPost.PostOnNewsFeed();
    Superman.timeline.DisplayTimeLine();

    return 0;
}