Question

C++ PLEASE

Provide a class for authoring a simple letter. In the constructor, supply the names of the sender and the recipient.

The header file for this class is given below.

#ifndef LETTER_H
#define LETTER_H

#include
#include

using namespace std;

class Letter
{
public:
   //constructor
   Letter(string from = "John", string to = "Ana");

   void add_line(string line);

   string get_text() const;

private:
   string sender;
   string recipient;
   vector lines;

};

#endif

-Implement the constructor to initialize data members sender and recipient.

-Implement member function add_line(string line) to add a line of text to the body of the letter. [hint: use push_back( ) member function of vector class]

-Implement member function get_text( ) that returns the entire text of the letter. The text has the form:

Dear recipient name:
Blank line
First line of the body
Second line of the body
…
Last line of the body
Blank line,
Sincerely,
Blank line
Sender name

-Supply a main( ) function that prints the letter.

Dear John:

I am sorry we must part.
I wish you all the best.

Sincerely,

Mary

Construct an object of the Letter class with “John” as recipient and “Mary” as sender and call add_line( ) twice.

Answer 1

Code

Letter.h

#ifndef LETTER_H
#define LETTER_H

#include<vector>
#include<string>

using namespace std;

class Letter
{
public:
   //constructor
   Letter(string from = "John", string to = "Ana");
   void add_line(string line);
   string get_text() const;

private:
   string sender;
   string recipient;
   vector<string>lines;
};
#endif

Letter.cpp

#include "Letter.h"

Letter::Letter(string from, string to)
{
   this->sender = from;
   this->recipient = to;
}

void Letter::add_line(string line)
{
   this->lines.push_back(line);
}

string Letter::get_text() const
{
   string str = "";
   str += "Dear " + sender;
   str += "\n\n";
   for (int i = 0; i < lines.size(); i++)
       str += lines[i] + "\n";
   str += "\n";
   str += "Sincerely,\n";
   str += recipient;
   return str;
}

Main.cpp

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

int main()
{
   Letter l("John", "Mary");
   l.add_line("I am sorry we must part.");
   l.add_line("I wish you all the best.");

   cout << l.get_text() << endl;

   system("pause");
   return 0;
}

Output

D:Chegg\C++\Letter class Debug Letter class.exe Dear John - x I am sorry we must part. I wish you all the best. Sincerely, Mary Press any key to continue ...

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