Directory:Derek Elder/Programs/SortedMovieList

MovieType.h

#include <iostream>
#include <fstream>
#include <string>
#include <iomanip>
using namespace std;

#ifndef __MovieType_H__
#define __MovieType_H__

const string EndOfFile = "***";

class MovieType
{
	string m_title;
	int m_year;
	int m_gross;
	string m_studio;
	string m_stars;
public:
	MovieType();
	//Purpose:Default Constructor.
	//Precondition:None
	//Postcondition:None
	int CompareKeys(const MovieType& movie2) const;
	//Purpose:To compare two movies and determine where it should be inserted.
	//Precondition:Add function must be called and executed.
	//Postcondition:String compare function is called to execute the comparison, resulting in two possible outcomes:
	//				1.A positive value is returned and is added into the list.
	//				2.A 0 or a negative value is returned and isn't added into the list.
	void Initialize(string title, int year, int gross, string studio, string stars);
	//Purpose:Initializes a movie item with data, basically a constructor.
	//Precondition:None
	//Postcondition:Populated with initial data.
	bool ReadOneMovieFromFile(istream& is = cin);
	//Purpose:To read one movie from a file at a time.
	//Precondition:ReadAllMovies() must be called.
	//Postcondition:1.True is returned if one movie was taken from the data file and entered into the list.
	//		2.False is returned if the EndOfFile flag was reached.
	void Display(ostream&os = cout) const;
	//Purpose:Displays one movie from the list.
	//Precondition:List array must contain data.
	//Postcondition:Data listed to the console screen.
};
int MovieType::CompareKeys(const MovieType& movie2) const
{
	return (m_title.compare(movie2.m_title));
}
void MovieType::Initialize(string title, int year, int gross, string studio, string stars)
{
	m_title = title;
	m_year = year;
	m_gross = gross;
	m_studio = studio;
	m_stars = stars;
}
void MovieType::Display(ostream& os) const
{
	if(m_title == EndOfFile)
	{
		os<<"";
	}
	else
	{
		os<<"Title:\t"<<m_title<<endl;
		os<<"Year:\t"<<m_year<<endl;
		os<<"Gross:\t$ "<<m_gross<<endl;
		os<<"Studio:\t"<<m_studio<<endl;
		os<<"Stars:\t"<<m_stars<<endl;
		os<<endl;
	}
}
bool MovieType::ReadOneMovieFromFile(istream& is)
{
	int index;
	string str = "";

	getline(is,m_title);
	if(m_title == EndOfFile)
	{
		return false;
	}
	else
	{
		is>>m_year;
		is>>m_gross;
		is>>m_studio;
		getline(is,str);
		index = (int)str.find_first_of(",",0);
		if(index > 0)
			m_stars = str.substr(index+2,(str.length() - (index+1)));
		else
			m_stars = "None";
		return true;
	}
}
MovieType::MovieType()
:m_title(""), m_year(-1), m_gross(-1), m_studio(""), m_stars("")
{}
#endif

SortedMovieList.h

#include <iostream>
#include <fstream>
#include <string>
#include <iomanip>
#include "MovieType.h"
using namespace std;
typedef MovieType MovieListItemType;

const int MAX = 20;
int counter = 0;

class SortedMovieList
{
public:
	SortedMovieList();
	//Purpose:Default Constructor.
	//Precondition:None
	//Postcondition:None
	void listAdd(const MovieListItemType& newItem, bool& success);
	//Purpose:To insert a movie in the array.
	//Precondition:ReadAllMovies function executes.
	//Postcondition:listInsert function is called to find the correct position for the movie to be inserted.
	void listInsert(int index, MovieListItemType newItem, bool& success);
	//Purpose:To insert a movie in the correct position in the array.
	//Precondition:listAdd function is called.
	//Postcondition:Item is inserted into the correct place in the list.
	void listSubtract(const MovieListItemType& itemToRemove, bool& success);
	//Purpose:To remove a movie from the array.
	//Precondition:Remove choice is called from the menu.
	//Postcondition:The movie is removed from the list
	void listRemove(int index, bool& success);
	//Purpose:To remove a movie from the array.
	//Precondition:Remove choice is called from the menu.
	//Postcondition:The movie is removed from the list.
	void ReadAllMovies();
	//Purpose:Reads all of the movies in an input file.
	//Precondition:ReadOneMovieFromFile executes correctly.
	//Postcondition:The list is populated with all of the movies from the file.
	void DisplayList() const;
	//Purpose:Displays the entire list of movies.
	//Precondition:Array is populated from ReadAllMovies().
	//Postcondition:The list is displayed to the console.
	void Search(const MovieListItemType& itemToSearch, bool& success);
	//Purpose:To search through the list for the correct movie.
	//Precondition:Search called from the menu.
	//Postcondition:1.If the movie is found the index where it was found is returned.
	//		2.If the movie is not found the user will be notified.
	
private:
	MovieListItemType items[MAX];
	int size;
};

SortedMovieList::SortedMovieList()
:size(0)
{}
void SortedMovieList::listAdd(const MovieListItemType& newItem, bool& success)
{
	int i = 0;

	if(size == 0)
	{
		listInsert(i,newItem,success);
		return;
	}
	while((i < size) && (newItem.CompareKeys(items[i]) == 1))
	{
		i++;
	}

	listInsert(i,newItem,success);
}
void SortedMovieList::listInsert(int index, MovieListItemType newItem, bool& success) 
{ 
   success = ((index >= 0) && (index <= size) && (size < MAX));

   if(success)
   {
	   for(int pos = size; pos >= index; pos--)
	   {
		   items[pos+1] = items[pos];
	   }
	   items[index] = newItem; 
	   size++;
	   counter++;
   }
}
void SortedMovieList::listSubtract(const MovieListItemType& itemToRemove, bool& success)
{
	int i = 0;

	if(size == 0)
	{
		cout<<"List is empty"<<endl;
	}

	while((i < size) && (itemToRemove.CompareKeys(items[i]) == 1))
	{
		i++;
	}

	listRemove(i,success);
}
void SortedMovieList::listRemove(int index, bool& success)
{
	success = ((index >= 0) && (index < size));

	if(success)
	{
	   for(int fromPosition = index + 1; fromPosition < size; fromPosition++)
		   items[fromPosition-1] = items[fromPosition];
	   size--;
	   counter--;
	}
}
void SortedMovieList::ReadAllMovies()
{
	MovieListItemType newItem;
	ifstream Input;
	int i = 0;
	bool success;
	string inputFile = "";

	Input.clear();
	cout<<"Welcome, please enter the name of your Input file: ";
	cin>>inputFile;
	cin.ignore(50,'\n');
	Input.open(inputFile.c_str());

	while(newItem.ReadOneMovieFromFile(Input))
	{
		this->listAdd(newItem,success);
	}

	Input.close();
}
void SortedMovieList::DisplayList() const
{
	int i;

	for(i = 0; i < size; i++)
	{
		items[i].Display();

		if(i%3 == 0) //Every 3 movies, pause.
		{
			cout<<"Press 'ENTER' if you wish to display more movies";
			cin.get();
			cout<<endl;
		}
	}
}
void SortedMovieList::Search(const MovieListItemType& itemToSearch, bool& success)
{
	int i;

	for(i = 0; i < size; i++)
	{
		if(itemToSearch.CompareKeys(items[i]) == 0)
		{
			cout<<endl<<"The Movie has been found at index "<<i<<"."<<endl;
			items[i].Display();
			break; //If the movie is found, go no further.
		}

		if(itemToSearch.CompareKeys(items[i]) == -1)
		{
			cout<<endl<<"The movie you wished to search for has not been found."<<endl;
			break; //If you have gone past the point where the movie should be stored
			       //in the list, go no further.
		}
	}

	if(i == size)
		cout<<endl<<"The movie you wished to search for has not been found."<<endl;
}

Main.cpp

#include <iostream>
#include <fstream>
#include <string>
#include <iomanip>
#include "MovieType.h"
#include "SortedMovieList.h"
using namespace std;

void clearScreen();
//Purpose:To clear the screen.
//Precondition:None
//Postcondition:Screen is cleared.
char displayMenuAndGetSelection();
//Purpose:To display the menu and get the selection for searching.
//Precondition:None
//Postcondition:Search choice is entered and appropriate function is called.
void addPerson(SortedMovieList& movieList);
//Purpose:To add a person to the list.
//Precondition:Choice must be selected from the menu.
//Postcondition:List is searched and results are output to the console.
void removePerson(SortedMovieList& movieList);
//Purpose:To remove a person from the list.
//Precondition:Choice must be selected from the menu.
//Postcondition:List is searched and results are output to the console.
void Pause();
//Purpose:To pause the program and allow the user a break.
//Precondition:None
//Postcondition:None
void searchList(SortedMovieList& movieList);
//Purpose:To call the search function and find a movie in the list.
//Precondition:Choice must be selected from the menu.
//Postcondition:Search function is called.
void quitProgram();
//Purpose:To inform the user the program has been terminated.
//Precondition:None
//Postcondition:Program terminated.

void main()
{
	char menuChoice = ' ';
	bool done = false;
	SortedMovieList movieList;

	movieList.ReadAllMovies();

	while(!done)
	{
		menuChoice = displayMenuAndGetSelection();
		clearScreen();
		switch(menuChoice)
		{
			case '1':
				movieList.DisplayList();
				Pause();
				done = false;
				break;
			case '2':
				searchList(movieList);
				Pause();
				done = false;
				break;
			case '3':
				removePerson(movieList);
				Pause();
				done = false;
				break;
			case '4':
				addPerson(movieList);
				Pause();
				done = false;
				break;
			case '5':
				cout<<"There are currently "<<counter<<" movies in the list."<<endl;
				Pause();
				done = false;
				break;
			case '6':
				quitProgram();
				done = true;
				break;
			default:
				cout<<"Incorrect choice selected"<<endl;
				Pause();
				done = false;
				break;
		}
	}
}

void clearScreen()
{
	system("cls");
}
char displayMenuAndGetSelection()
{
	char choice;
	clearScreen();
	cout<<endl<<endl<<endl;
	cout<<"'1' -- View the list."<<endl<<endl;
	cout<<"'2' -- Search the list."<<endl<<endl;
	cout<<"'3' -- Delete a movie from the list."<<endl<<endl;
	cout<<"'4' -- Add a movie to the list."<<endl<<endl;
	cout<<"'5' -- Count the number of movies in the list."<<endl<<endl;
	cout<<"'6' -- Quit the program."<<endl<<endl;
	cin>>choice;
	cin.ignore(50,'\n');
	return choice;
}
void addPerson(SortedMovieList& movieList)
{
	MovieType movie;
	string title, studio, stars;
	int year, gross;
	cout<<"Enter title: ";
	getline(cin,title,'\n');
	cout<<"Enter year: ";
	cin>>year;
	cout<<"Enter gross: ";
	cin>>gross;
	cout<<"Enter studio: ";
	cin>>studio;
	cout<<"Enter stars: ";
	cin>>stars;
	movie.Initialize(title,year,gross,studio,stars);
	bool success;
	movieList.listAdd(movie,success);

	cout<<endl<<"The movie has been added to the list."<<endl;
}
void removePerson(SortedMovieList& movieList)
{
	MovieType movie;
	string title;
	cout<<"Enter the title of the movie you wish to remove: ";
	getline(cin,title,'\n');
	movie.Initialize(title,0,0,"","");
	bool success;
	movieList.listSubtract(movie,success);

	cout<<endl<<"The movie has been removed from the list."<<endl;
}
void searchList(SortedMovieList& movieList)
{
	MovieType movie;
	string title;
	cout<<"Enter the title of the movie you wish to search for: ";
	getline(cin,title,'\n');
	bool success;
	movie.Initialize(title,0,0,"","");
	movieList.Search(movie,success);

	cout<<endl<<"The search has been conducted."<<endl;
}
void Pause()
{
	cout<<endl<<"Press 'ENTER' to continue..."<<endl;
	cin.get();
}
void quitProgram()
{
	cout<<"Program terminated, good bye!"<<endl;
	cout<<endl;
}