Many mathematical problems require the addition, subtraction, and multiplication of two matrices. Write an ADT Matrix. You may use the following class definition. const int MAX_ROWS = 10; const int MAX_COLS = 10; class MatrixType { public: MatrixType(); void MakeEmpty(); void SetSize(int rowsSize, int colSize); void StoreItem(int item, int row, int col); void Add(MatrixType otherOperand, MatrixType& result); void Sub(MatrixType otherOperand, MatrixType& result); void Mult(MatrixType otherOperand, MatrixType& result); void Print(ofstream& outfile); bool AddSubCompatible(MatrixType otherOperand); bool MultCompatible(MatrixType otherOperand); private: int values[MAX_ROWS][MAX_COLS]; int numRows; int numCols; }; Before you start looking at how to implement this class, you must determine and document the appropriate preconditions and postconditions for each operation. Note that the class provides the member functions to allow the client to determine if the binary matrix operations are possible. Before this class can become a permanent part of your program library, it must be thoroughly tested. Write a menu driven testing program to test your MatrixType. Test Driver The test driver should handle the following options. (See processing notes for definition of ). GetNewMatrix Number of rows and number of columns are on the next line. Values for each row and column AddMatrices Add first and second, leaving the result in the third SubMatrices Subtract second from first, leaving the result in the third MultiplyMatrices Multiply first and second, leaving the result in the third PrintMatrix Print the matrix one row per line on DataOut Quit Processing Notes 1. is a number between 0 and 9. This value is used as an index into an array of MatrixType. 2. The main function must include a Switch statement where the case expression is a user-defined enumeration type. This means that the command is recognized and its enumeration equivalent is sent back to be used in the case statement. 3. The driver must ensure the preconditions of the member functions of MatrixType. Throw an exception if an error occurs and continue processing. Solution #include #include using namespace std; struct matrixType{ int matDimension; int matValues[10][10]; }; class MatrixADT{ private: matrixType resultMatrix; public: void intializeResultMatrix(int); matrixType add(matrixType, matrixType); matrixType subtract(matrixType,matrixType); matrixType multiply(matrixType,matrixType); void printResult(); }; matrixType MatrixADT::add(matrixType M1, matrixType M2){ } matrixType MatrixADT::subtract(matrixType M1, matrixType M2){ } matrixType MatrixADT::multiply(matrixType M1, matrixType M2){ } void MatrixADT::intializeResultMatrix(int dim){ } int main(){ MatrixADT maX; matrixType M1, M2; char op; int dim; maX.printResult(); } void MatrixADT::printResult(){ int i,j; for (i=0;i for (j=0; j cout<.

1. Note: Use Java Write a web server that is capable of processing only 1 request. Your web server
will: Create a connection socket when contacted by the client (browser) Receive the HTTP
request from this connection Parse the request to determine the specific file being requested Get
the requested file from the server's file system Create an HTTP response message consisting of
the requested file Send the response over TCP Connection to the requesting browser If a client
requests a file that is not present in your server, your server should return a "404 Not Found"
error message.
Solution
For this problem we will create a UI using swings library. also we will create a separate
WebServer class for
the server implementation. We will run the server in a separate thread and for this we will use
Thread class.
Class UI:
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.event.WindowEvent;
import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
/* this class contains A simple Swing UI.
* which has one start button and one txt console
*/
public class UI extends JFrame {
static Integer portNumber = null;
JPanel mainPanel;
JScrollPane scrollPane;
JButton btnStartServer;
JTextArea textArea_1;

2. public UI() {
mainPanel = new JPanel();
scrollPane = new JScrollPane();
btnStartServer = new JButton("Start Server");
btnStartServer.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
startServer();
}
});
getContentPane().add(btnStartServer, BorderLayout.SOUTH);
textArea_1 = new JTextArea();
textArea_1.setBackground(Color.BLACK);
textArea_1.setForeground(new Color(255, 255, 255));
textArea_1.setRows(30);
textArea_1.setColumns(30);
getContentPane().add(textArea_1, BorderLayout.CENTER);
textArea_1.setBorder(BorderFactory.createLoweredBevelBorder());
textArea_1.setEditable(false);
this.setTitle("Simple Web Server");
this.addWindowListener(new java.awt.event.WindowAdapter() {
public void windowClosing(WindowEvent e) {
close(e);
}
});
scrollPane.setViewportView(textArea_1);
mainPanel.add(scrollPane);
this.getContentPane().add(mainPanel, BorderLayout.EAST);
this.setVisible(true);
this.setSize(350,300);
this.setResizable(false);
this.validate();
}
private void startServer() {

3. new WebServer(portNumber.intValue(), this);
}
void close(WindowEvent event) {
System.exit(1);
}
public void displayMessage(String s) {
textArea_1.append(s);
}
public static void main(String[] args) {
portNumber = new Integer(8080);
UI ui = new UI();
}
}
Class WebServer :
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;
public class WebServer extends Thread {
private UI message_to; // need UI to display Message
private int portNumber; //need port to run on localhost
//Constructor, takes portNumber and UI as input
public WebServer(int portNumber, UI ui) {
this.message_to = ui;
this.portNumber = portNumber;
this.start();
}
// Thread implementation, overriding run method to run server in separate thread
public void run() {
ServerSocket socket = null;
sendMessage("Starting Server. . . ");

4. try {
sendMessage("Checking port " + Integer.toString(portNumber) + ". . . . . ");
socket = new ServerSocket(portNumber);
}
catch (Exception exception) {
sendMessage("Error:" + exception.getMessage());
return;
}
sendMessage("Started . . . ");
while (true) {
sendMessage("Ready and awaiting for requests. . . ");
try {
Socket cSocket = socket.accept();
InetAddress address = cSocket.getInetAddress();
sendMessage(address.getHostName() + " connected to server. ");
BufferedReader reader =new BufferedReader(new
InputStreamReader(cSocket.getInputStream()));
DataOutputStream outputStream =new
DataOutputStream(cSocket.getOutputStream());
serviceRequest(reader, outputStream);
}
catch (Exception exception) {
sendMessage(" Error:" + exception.getMessage());
}
}
}
private void serviceRequest(BufferedReader reader, DataOutputStream outputStream) {
boolean isGet=false;
String path = new String();
try {
String str1 = reader.readLine();
String str2 = new String(str1);
str1.toUpperCase();
if (str1.startsWith("GET")) {
isGet=true;
}else if (str1.startsWith("HEAD")) { //

5. }else {
try {
outputStream.writeBytes(constructHeader(501, 0));
outputStream.close();
return;
}
catch (Exception exception) {
sendMessage("Error:" + exception.getMessage());
}
}
int first = 0;
int last = 0;
for (int a = 0; a < str2.length(); a++) {
if (str2.charAt(a) == ' ' && first != 0) {
last = a;
break;
}
if (str2.charAt(a) == ' ' && first == 0) {
first = a;
}
}
path = str2.substring(first + 2, last);
}
catch (Exception exception) {
sendMessage("Error:" + exception.getMessage());
}
sendMessage(" Requested file:" + new File(path).getAbsolutePath() + " ");
FileInputStream inputStream = null;
try {
inputStream = new FileInputStream(path);
}
catch (Exception exception) {
try {
outputStream.writeBytes(constructHeader(404, 0));
outputStream.close();
}

6. catch (Exception e) {
sendMessage("Error: " + e.getMessage());
}
sendMessage("Error: " + exception.getMessage());
}
try {
int type = 0;
if (path.endsWith(".jpg") || path.endsWith(".jpeg")) {
type = 1;
}else if (path.endsWith(".gif")) {
type = 2;
}else if (path.endsWith(".zip") || path.endsWith(".exe")|| path.endsWith(".tar")) {
type = 3;
}
outputStream.writeBytes(constructHeader(200, type));
if (isGet) {
while (true) {
int b = inputStream.read();
if (b == -1) {
break;
}
outputStream.write(b);
}
}
outputStream.close();
inputStream.close();
}
catch (Exception exception) {
sendMessage("Error: " + exception.getMessage());
}
}
private String constructHeader(int return_code, int type) {
String header = "HTTP/1.0 ";
switch (return_code) {
case 200:

7. header = header + "200 OK";
break;
case 404:
header = header + "404 Not Found";
break;
}
header = header + " ";
header = header + "Connection: close ";
header = header + "Server: SimpleWebServer v0 ";
switch (type) {
case 0:
break;
case 1:
header = header + "Content-Type: image/jpeg ";
break;
case 2:
header = header + "Content-Type: image/gif ";
case 3:
header = header + "Content-Type: application/x-zip-compressed ";
default:
header = header + "Content-Type: text/html ";
break;
}
header = header + " ";
return header;
}
private void sendMessage(String message) {
message_to.displayMessage(message);
}
}