The program is best made in java Answer only if you know the answer. and it shou

Question

The program is best made in java
Answer only if you know the answer. and it should be working

Using your favorite programming language do the following: 1) Implement DFA as a menu-based or GUI program 2) Allow the user to configure the DFA interactively and using a config txt file 3) The configuration consists of: {Q, q0, F, S, d) 4) The DFA continuously allows the user to enter an input string via keyboard or a list of strings in a txt file 5) The DFA scans the input string and generates a "ACCEPT" or "REJECT"

Explanation / Answer

Answer:

Message.h

main.cpp

#include <iostream>
#include <fstream>
#include <cstdlib>
#include <cstring>
using namespace std;
#include "BBoard.h"
#include "User.h"
#include "Message.h"
#include "Reply.h"
#include "Topic.h"

/*int main(int argc, char* argv[])
{
    string file = argv[argc - 1];
    //   Message m;
   // m.display();
   // cout << endl;
   // Message m1("Zafir", "Great Subject", "THis is the body!!");
   // m1.display();
  
   BBoard board;
   board.setup(file);
   board.login();
    return 0;
}*/

int main(int argc, char **argv)
{
    // check commandline arguments
   // if (argc != 3){
     //   cout << "ERROR: Invalid program call." << endl
       //     << "Usage: <program_name> userfile datafile" << endl;
        //return 1;
    //}
    string userfile("users1.txt");
    string datafile("data.txt");

    BBoard bb("Bulletin Board");

    // load users from file
    if (!bb.load_users(userfile))
    {
        cout << "ERROR: Cannot load users from " << userfile << endl;
        return 1;
    }

    // load messages
    if (!bb.load_messages(datafile))
    {
        cout << "ERROR: Cannot load messages from " << datafile << endl;
        return 1;
    }
   
    bb.login();
    //bool a = bb.save_messages("out.txt");
    //a=a;
    bb.run();

    // save messages
    if (!bb.save_messages(datafile))
    {
        cout << "ERROR: Cannot save messages to " << datafile << endl;
        return 1;
    }
   // cout << "saved" << endl;
    return 0;
}

BBoard.cpp

#include "BBoard.h"
#include "Reply.h"
#include "Topic.h"
#include <fstream>
#include <iostream>
#include <string>
#include <sstream>
#include <cstdlib>
using namespace std;
BBoard::BBoard(){
   current_user=NULL;
}
BBoard::BBoard(const string &ttl){
   title=ttl;
   current_user = NULL;

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