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Question

 Create the following program by using C# OOP Composition technique. An Album contains 3 songs. Create the class "Album" and the class "Song". Create the an Album object call "nirvanaAlbum" and use composition to make sure that the Album object contain the 3 Song objects (song1 , song2 and song3). 

The following are properties for each of the object. 

Album Object "nirvanaAlbum" Album Name = "Nevermind" Album Studio = "Geffen" Year Release = 1991 

Song Object "Song1" 

Song Name = "On A Plain" Song Singer = "Nirvana" Song Length = 3.30 

Song Object "Song2" 

Song Name = "Endless, Nameless" Song Singer = "Nirvana feat Pearl Jam" Song Length = 5.00 

Song Object "Song3" 

Song Name = "Lounge Act" Song Singer = "Nirvana" Song Length = 4.10 

Finally, output all the album info along with all of the songs to the screen.  < 5 pts >

Answer 1

using namespace std;

#include <iostream>

#include <string.h>

#include <stdlib.h>

#define SONG_NAME_LENGTH (255)

#define SONG_ARTIST_NAME_LENGTH (255)

#define ALBUM_NAME_LENGTH (255)

#define STUDIO_NAME_LENGTH (255)

class Song

{

private:

char name[SONG_NAME_LENGTH];

char artist[SONG_ARTIST_NAME_LENGTH];

double lengthTime;

public:

Song ( char * strSongName, char * strSongArtistName, double dblTime)

{

strcpy(name,strSongName);

strcpy(artist,strSongArtistName);

lengthTime = dblTime;

}

int SongNameLength() { return(strlen(name)); }

int SongArtistNameLength() { return(strlen(artist)); }

void GetSongName( char * buff) { strcpy(buff,name); }

void GetSongArtistName( char * buff) { strcpy(buff,artist); }

double GetSongTimeLength() { return(lengthTime); }

void Output(char * msg=NULL)

{

if (msg!=NULL)

{

cout << "******************************************"<< endl;

cout << msg << endl;

}

cout << "***********************************************"<< endl;

cout << " SONG NAME = >" << name << "<" << endl;

cout << " ARTIST = >" << artist << "<" << endl;

cout << " TIME LENGTH " << lengthTime << endl;

}

Song ( Song * song)

{

cout << "copy constructor" << endl;

song->GetSongName(this->name);

song->GetSongArtistName(this->artist);

lengthTime = song->GetSongTimeLength();

cout << this->name << endl;

cout << this->artist << endl;

cout << lengthTime << endl;

}

};

class Album

{

private:

char name[ALBUM_NAME_LENGTH];

char studio[STUDIO_NAME_LENGTH];

int year;

Song ** songs;

int numSongs;

public:

Album( char * strAlbumName, char * strStudioName, int Year, int iNumSongs, Song ** songArray)

{

strcpy(name,strAlbumName);

strcpy(studio,strStudioName);

year = Year;

numSongs = iNumSongs;

songs = (Song **) malloc (numSongs * sizeof(Song *));

for (int iLoop=0; iLoop<numSongs; iLoop++)

{

songs[iLoop] = new Song(songArray[iLoop]) ;

}

}

int GetAlbumNameLength() { return(strlen(name)); }

int GetStudioNameLength() { return(strlen(studio)); }

int GetYear() { return(year); }

void GetAlbumName( char * buff) { strcpy(buff,name); }

void GetStudioName( char * buff) { strcpy(buff,studio); }

int GetNumSongs() { return(numSongs); }

void GetSong( int iIndex, Song * song)

{

if (

(iIndex>=0) && (iIndex<numSongs)

)

{

song = songs[iIndex];

}

}

void Output( char * msg=NULL)

{

if (msg!=NULL)

{

cout << "**************************************"<< endl;

cout << msg << endl;

}

cout <<"********************************************"<< endl;

cout << " album name >" << name << "<" << endl;

cout << " studio >" << studio << "<" << endl;

cout << " year " << year << endl;

cout << " # of songs :" << numSongs << endl;

char strMsg[25];

for (int iLoop=0; iLoop<numSongs; iLoop++)

{

sprintf(strMsg," Song # %d",(iLoop+1));

songs[iLoop]->Output(strMsg);

}

}

~Album()

{

if (songs != NULL)

{

for (int iLoop=0; iLoop<numSongs; iLoop++)

{

delete(songs[iLoop]);

songs[iLoop]=NULL;

}

free(songs);

songs=NULL;

}

}

};

int main()

{

Song Song1("On A Plain","Nirvana",3.30f);

Song Song2("Endless,Nameless","Nirvana feat Pearl Jam",5.00f);

Song Song3("Lounge Act","Nirvana",4.10f);

Song * songs[3];

songs[0] = &Song1;

songs[1] = &Song2;

songs[2] = &Song3;

Album nirvanaAlbum("Nevermind","Geffen",1991,3,songs);

nirvanaAlbum.Output();

}