To be written in C++. The purpose of this program is to design and implement an
ID: 663460 • Letter: T
Question
To be written in C++.
The purpose of this program is to design and implement an Inbox class for an e-mail system. The Inbox for this assignment will be a very simplified version of what a real Inbox would be i.e., our Inbox will be for Goofy mail or gmail for short.
Like the real gmail, it will consist of a set of communications, where each communication consists of the set of e-mails involved in that communication, i.e., having the same subject.
A new e-mail will be added as follows:
1.If the subject is different from any communication already in the Inbox, then
a.A new communication will be created consisting of the new e-mail.
b.This new communication will then be placed at the beginning of the Inbox.
2.If the subject already occurs in a communication, then
a.The communication will be added to the beginning of the communication
b.The communication will be moved to the beginning of the Inbox.
Inbox will be implemented using a doubly-linked list of communication nodesrepresenting the communications (i.e., e-mails having the same subject). The emails within a communication will also be implemented with a doubly linked list.
Structure of the Communication node: The Communication node will have the following fields
Subject: subject of e-mails associated with communication
Number of e-mails: keep track of the number of e-mails in communication
Email: A header for doubly linked list of emails associated with the communication
Structure of the Email nodes
To: string with name (e-mail address) of person who received e-mail
From: string with name (e-mail address) of person who sent e-mail
Message: Assume that message fits on one line
Some main functions associated with the class Inbox are:
InsertEmail() Inserts a new e-mail as described above.
DeleteCommunication() Deletes a communication having a given subject.
SearchCommunicaton() Searches the Inbox for a communication using subject as the key for the search. It returns a pointer to the communication node that matches the subject, or the null pointer if no such node is found. This function should be private, and will be needed for both insertions and deletion.
DisplayInbox() This will display Inbox by listing the communication in the order they appear in the Inbox from the most recent to the oldest, i.e., from beginning of doubly-linked list of communications, displaying the subject and the number of e-mails in the communication.
You will also need to include a destructor and a copy constructor..
Your main program will input a set of emails, where each mail consists of simply the subject, and displays the inbox.
Example:
Input e-mails (subjects) and terminate by entering done
Sample input:
Weather
Weather
Weather
Picnic
Picnic
Birthday Party
Picnic
Weather
Greetings
Birthday Party
Sample Run:
Inbox: total number of emails is 10.
Birthday Party 2
Greetings - 1
Weather - 4
Picnic - 3
Explanation / Answer
#include <iostream>
#include <string>
using namespace std;
int count=0;
CommunicationNode pointer = new CommunicationNode[30]; //declaring structs of array
struct CommunicationNode //structure for CommunicationNode
{
std::string subject;
int NoEmails;
struct email e;
};
struct email //structure for email
{
std::string To;
std::string From;
std::string Message;
};
void insertMail(){ //creating new struct
cout << "Enter subject: ";
getline(cin, pointer[count].subject);
cout << " Enter number of emails: ";
getline(cin, pointer[count].NoEmails);
cout << " Enter To: ";
getline(cin, pointer[count].email.To);
cout << " Enter From: ";
getline(cin, pointer[count].email.From);
cout << " Enter message: ";
getline(cin, pointer[count].email.Message);
count++;
}
void DeleteCommunication(){ //deleting struct data
delete pointer;
}
void searchCommunication(){
}
void displayInbox(){ //displaying struct data
for(int i=0;i<count;i++){
cout << pointer[0].subject;
cout << pointer[0].NoEmails;
cout << pointer[0].email.To;
cout << pointer[0].email.From;
cout << pointer[0].email.Message;
}
}
int main()
{
//calling methods here
insertMail();
displayInbox();
DeleteCommunication();
return 0;
}
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