Question

The popular social network Facebook ^TM was founded by Mark Zuckerberg and his classmates at Harvard University in 2004. At the time, he was a sophomore studying computer science.

Design and implement an application that maintains the data for a simple social network. Each person in the network should have a profile that contains the person's name, an image(extra credit), current status(Online, offline, busy,...), and a list of friends. Your application should allow a user to join the network, leave the network, create profile, modify the profile, search for other profiles, and add and remove friends.

use java

• You need to implement CRUD (In computer programming, create, read, update, and delete (CRUD) are the four basic functions):
• C= Create: Add profile- Add friends
• R= Read: Read the information of a profile - Search for other profiles
• U= Update: Update and edit the profile - Update the friend list
• D= Delete: Delete a profile - Delete a friend of a profile.
• You need to have a class diagram for your program (A simple one is acceptable):

Following are my projects. Could you help me add a class diagram for them? You can change the projects.

Profile class

import java.util.ArrayList;
import java.util.List;


public class Profile {


        public Profile(String name) {
                this.name=name;
                this.status="Online";
        }
        
        private String name;
        
        private String image;
        
        private String status;
        
        private List<Profile> friend=new ArrayList<Profile>();


        public String getName() {
                return name;
        }


        public void setName(String name) {
                this.name = name;
        }


        public String getImage() {
                return image;
        }


        public void setImage(String image) {
                this.image = image;
        }


        public String getStatus() {
                return status;
        }


        public void setStatus(String status) {
                this.status = status;
        }


        public List<Profile> getFriend() {
                return friend;
        }


        public void setFriend(List<Profile> friend) {
                this.friend = friend;
        }
        
        public void addFriend(Profile profile) {
                this.friend.add(profile);
        }


        @Override
        public String toString() {
                StringBuilder builder = new StringBuilder();
                builder.append("[name=");
                builder.append(name);
                builder.append(", image=");
                builder.append(image);
                builder.append(", status=");
                builder.append(status);
                builder.append(", friend=");
                builder.append(friend);
                builder.append("]");
                return builder.toString();
        }
        
}

Test.java

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;


public class Test2 {


        private static List<Profile> profiles=new ArrayList<Profile>();


        public static void main(String[] args) {
                
                
                Scanner scanner=new Scanner(System.in);
                
                System.out.println("Please select option: ");
                System.out.println("1 for Add a new Profile ");
                System.out.println("2 for Search Profiles ");
                System.out.println("3 for Update and edit the profile ");
                System.out.println("4 for Delete a profile ");
                System.out.println("-1 for quit ");
                
                int iProfile=scanner.nextInt();
                
                if(iProfile==-1) {
                        scanner.close();
                        return;
                }else if(iProfile==1) {
                        System.out.println("Please enter name for profile :\n");
                        String name=scanner.next();
                        
                        if(name!=null && name.trim()!="") {
                                Profile profile=new Profile(name);
                                System.out.println("Please enter profile picture url :");
                                String profilePicture=scanner.next();
                                profile.setImage(profilePicture);
                                profiles.add(profile);
                        }
                        main(new String[] {});  
                        
                }else if(iProfile==2) {
                        System.out.println("Profile at this Network");
                        for(Profile profile: profiles) {
                                System.out.println(profile);
                        }
                        main(new String[] {});
                }else if(iProfile==3) {
                        System.out.println("Please select profile which you want to update: ");
                        for(int i=0; i<profiles.size(); i++) {
                                System.out.println(i+" for "+profiles.get(i));
                        }
                        System.out.println("-1 for return to main menu");
                        int uProfile=scanner.nextInt();
                        if(uProfile==-1) {
                                main(new String[] {});
                        }else {
                                Profile profile=profiles.get(uProfile);
                                System.out.println("select profile adding friend");
                                for(int i=0; i<profiles.size(); i++) {
                                        System.out.println(i+" for "+profiles.get(i));
                                }
                                System.out.println("-1 for return to main menu");
                                int fProfile=scanner.nextInt();
                                if(fProfile==-1) {
                                        main(new String[] {});
                                }else {
                                        profile.addFriend(profiles.get(fProfile));
                                        main(new String[] {});
                                }
                        }
                }else if(iProfile==4) {


                        System.out.println("Please select profile whose friend you want to delete");
                        for(int i=0; i<profiles.size(); i++) {
                                System.out.println(i+" for "+profiles.get(i));
                        }
                        System.out.println("-1 for return to main menu");
                        int dProfile=scanner.nextInt();
                        if(dProfile==-1) {
                                main(new String[] {});
                        }else {
                                System.out.println("select friend of "+profiles.get(dProfile).getName()+" want to delete");
                                for(int i=0; i<profiles.get(dProfile).getFriend().size(); i++) {
                                        System.out.println(i+" for "+profiles.get(dProfile).getFriend().get(i));
                                }
                                System.out.println("-1 for return to main menu");
                                int aProfile=scanner.nextInt();
                                if(aProfile==-1) {
                                        main(new String[] {});
                                }else {
                                        profiles.get(dProfile).getFriend().set(aProfile, null);
                                }
                        }
                }


        }


}

Answer 1

#include<iostream>

using namespace std;

class person{

string name;

string image;

string current_status;

int total_friend;

int friends[20];

public:

person(){

name="";

image="";

current_status="";

total_friend=0;

}

person(string nam,string img,string status){

name=nam;

image=img;

current_status=status;

total_friend=0;

}

void set_name(string nam){

name=nam;

}

void set_image(string img){

name=img;

}

void set_status(string status){

current_status=status;

}

void add_friend(int p){

friends[total_friend++]=p;

}

string get_name(){

return name;

}

string get_image(){

return image;

}

string get_status(){

return current_status;

}

int no_friend(){

return total_friend;

}

};

int main(){

person p[100];

int count=0;

int choice;

int index,id;

string name,img,status;

do{

cout<<"1:join network\n2:create_profile\n3:update profile\n4:add friend\n5:leave network\n6:search for other\n7:quit\n";

cin>>choice;

switch(choice){

case 1:{cout<<"welcome to network!\n";

cout<<"your id is : "<<count<<"\n";

count++;

break;

}

case 2:{

cout<<"Enter your id : ";

cin>>id;

if(id<0||id>count){

cout<<"invalid id \n";

break;

}

cout<<"Enter name : ";

cin>>name;

cout<<"Enter image file name : ";

cin>>img;

cout<<"Enter current_status : ";

cin>>status;

p[id]=person(name,img,status);

break;

}

case 3:{

cout<<"Enter your id : ";

cin>>id;

if(id<0||id>count){

cout<<"invalid id \n";

break;

}

int another_choice;

do{

cout<<"1:change name\n2:change image\n3:change status\n4:quit";

cin>>another_choice;

switch(another_choice){

case 1:{

cout<<"Enter name : ";

cin>>name;

p[id].set_name(name);

break;

}

case 2:{

cout<<"Enter image file name : ";

cin>>img;

p[id].set_image(img);

break;}

case 3:{

cout<<"Enter current status : ";

cin>>status;

p[id].set_status(status);

break;}

}}while(another_choice!=4);

break;

}

case 4:{

cout<<"Enter your id : ";

cin>>id;

if(id<0||id>count){

cout<<"invalid id \n";

break;

}

cout<<"enter id of friend : ";

int id2;

cin>>id2;

if(id2<0||id2>count){

cout<<"invalid id \n";

break;

}

p[id].add_friend(id2);

break;

}

case 5:{

cout<<"Enter your id : ";

cin>>id;

if(id<0||id>count){

cout<<"invalid id \n";

break;

}

for(int i=id;i<count-1;i++)

p[i]=p[i+1];

count--;

break;

}

case 6:{

cout<<"Enter your id to be searched: ";

cin>>id;

if(id<0||id>count){

cout<<"invalid id \n";

break;

}

cout<<"\nname : "<<p[id].get_name();

cout<<"\nimage : "<<p[id].get_image();

cout<<"\ncurrent status : "<<p[id].get_status();

cout<<"\nnumber of friends : " <<p[id].no_friend();

cout<<"\n";

break;

}

case 7:{

cout<<"Thank You!\n";

break;

}

}

}while(choice!=7);

return 0;

}