CS
210 – Fundamentals of Programming I
Spring 2007 – Programming
Project 2, Part B
70 points
Out: April 18/19
Due:
April 30/May 1
Part B of this programming project is to implement the program you designed in Part A. The work must be entirely your own except for any help you may receive from the instructor. Name your main program file main.cpp, the files for the MusicLibrary class musiclib.h and musiclib.cpp, and the files for the Album class album.h and album.cpp (i.e., the ones from Programming Assignment 7).
This project is to be submitted by email to cs210@csserver.evansville.edu. Email all 5 files (main.cpp, musiclib.h, musiclib.cpp, album.h, and album.cpp) as attachments to one email message. (Make sure you send it to csserver. If you send to just evansville.edu, it will not be delivered.)
Your program must compile for it to be graded. Programs that do not compile will be not be graded and will receive a score of 0. Any corrections given for the Album class from Programming Assignment 7 must be completed.
To facilitate the grading of your programs, you must add a member function to the MusicLibrary class that will (re)initialize the music library's collection of Albums with data read from a file. When a choice is made to initialize the music library, your program should ask the user for the name of the file to open, associate it with an ifstream variable, and read the expected data from the file stream. (See sample program run.) This action will replace the action of creating a new music library (choice 'A' in the example program run). This action should replace the data in the MusicLibrary object completely with the data from the file.
You should use InteractiveOpen from previous exercises to handle opening the file stream. This may be done either in the MusicLibrary class member function that does the initialization or in the main program with the opened ifstream object passed into the initialization function. Put the prototype and definition for InteractiveOpen in whichever file the function is being called in (musiclib.cpp or main.cpp).
Since the data is coming from a file, your program should not prompt for the data during initialization. You may assume that all of the data in the file is valid. (I.e., your program does not have to check for invalid data.) You may assume that there are no duplicates in the file.
The format of the input file will be as follows. The number of Albums will be on the first line. The second line will contain the artist, title, genre, and year recorded of the first Album. The next lines will contain the list of song titles followed by END_OF_TRACKLIST. And finally the last line will be the user rating for the first Album. The data for the second Album will follow, and so forth. Note that the Album class implements the standard input operator (>>) and the format of the data files conform to the use of this operator.
Test files albumdata1.dat and albumdata2.dat containing input data in the prescribed format will be made available at the course webpage no later than Friday, April 27. Recall that input files need to be stored in a folder that has no spaces in the full path name.
Make sure your program is user-friendly. The prompts should be informative and any output should be explained and formatted.
The program should gracefully handle invalid menu choices and the error conditions previously noted in Part A.
Follow the guidelines in the A C++ Programming Style Guideline handout. As stated in the syllabus, part of the grade on a programming project depends on how well you adhere to the guidelines. The grader will look at your code listing and grade it according to the guidelines.
Example Program Run
Assume that the file albumdata.dat contains the same album information that was shown in the example program run in Part A
Welcome to the CS 210 Music Library!
An empty music library has been created.
Please choose from the following actions:
A. Initialize the music library
B. Add a new album to the collection.
C. Change the user rating of an album
D. Print out information about an album
E. Print out a list of all albums
F. Print out a list of albums of the same genre
G. Print out a list of albums recorded in the same year
H. Print out a list of albums having at least a certain rating
I. Print out a list of albums recorded by a particular artist
J. Print out a random playlist of song tracks
K. Print out the number of albums in the music library collection
Q. Quit the program.
Your choice: A
Please enter the name of the input file: I:\albumdata.dat
The music library has been initialized.
Please choose from the following actions:
A. Initialize the music library
B. Add a new album to the collection.
C. Change the user rating of an album
D. Print out information about an album
E. Print out a list of all albums
F. Print out a list of albums of the same genre
G. Print out a list of albums recorded in the same year
H. Print out a list of albums having at least a certain rating
I. Print out a list of albums recorded by a particular artist
J. Print out a random playlist of song tracks
K. Print out the number of albums in the music library collection
Q. Quit the program.
Your choice: E
Artist Title Year Rating
----------------------------------------------------------------
Bruce_Springsteen Born_to_Run 1975 5
U2 Joshua_Tree 1987 5
The_Flaming_Lips Yoshimi_Battles_the_Pink_Robots 2002 5
Yanni Live_at_the_Acropolis 1993 4
Tim_McGraw Live_Like_You_Were_Dying 2004 3
The rest of the actions would be the same as shown in Part A. If choice 'A' is made again with a different file, then the result of choice 'E' would show (only) the data from the second file.
Extra credit (up to 10 points)
Note: This extra credit problem is in addition to the above assignment. I.e., you must still submit a program that conforms with the original assignment.
In iTunes it is possible for users to share music libraries allowing them to access and modify each others' music libraries. Extend your main program to handle multiple music libraries. When the program is started, it should have one MusicLibrary available that is designated as the current music library. It should include a new menu option to add a new (empty) MusicLibrary to the collection of music libraries. This action also should make the new music library the designated current music library. Another new option is to change the designated current music library. The "name" of a music library will be its index (between 0 and size-1) in the collection. All other menu options should be directed to the designated current music library. (See example program run below.)
The collection of music libraries should be implemented using a vector of MusicLibrary objects in the main program. The current music library should be designated using an index variable that is used to access the current music library from the vector. You must not change the operations of either the MusicLibrary or Album classes.
Name your the main program file mainextra.cpp. Submit it and the four class files (musiclib.h, musiclib.cpp, album.h, and album.cpp) attached to a second, separate email message.
Example program run of extra credit
Welcome to the CS 210 Music Library!
Music library 0 is the current music library
Please choose from the following actions:
A. Initialize the music library
B. Add a new album to the collection.
C. Change the user rating of an album
D. Print out information about an album
E. Print out a list of all albums
F. Print out a list of albums of the same genre
G. Print out a list of albums recorded in the same year
H. Print out a list of albums having at least a certain rating
I. Print out a list of albums recorded by a particular artist
J. Print out a random playlist of song tracks
K. Print out the number of albums in the music library collection
L. Change the current music library
M. Add a new music library
Q. Quit the program.
Your choice: M
Music library 1 has been added
Music library 1 is the current music library
Please choose from the following actions:
A. Initialize the music library
B. Add a new album to the collection.
C. Change the user rating of an album
D. Print out information about an album
E. Print out a list of all albums
F. Print out a list of albums of the same genre
G. Print out a list of albums recorded in the same year
H. Print out a list of albums having at least a certain rating
I. Print out a list of albums recorded by a particular artist
J. Print out a random playlist of song tracks
K. Print out the number of albums in the music library collection
L. Change the current music library
M. Add a new music library
Q. Quit the program.
Your choice: A
Please enter the name of the input file: albumdata.dat
Music library 1 has been initialized
Music library 1 is the current music library
Please choose from the following actions:
A. Initialize the music library
B. Add a new album to the collection.
C. Change the user rating of an album
D. Print out information about an album
E. Print out a list of all albums
F. Print out a list of albums of the same genre
G. Print out a list of albums recorded in the same year
H. Print out a list of albums having at least a certain rating
I. Print out a list of albums recorded by a particular artist
J. Print out a random playlist of song tracks
K. Print out the number of albums in the music library collection
L. Change the current music library
M. Add a new music library
Q. Quit the program.
Your choice: K
There is/are 5 album(s) in the Music library 1 collection.
Music library 1 is the current music library
Please choose from the following actions:
A. Initialize the music library
B. Add a new album to the collection.
C. Change the user rating of an album
D. Print out information about an album
E. Print out a list of all albums
F. Print out a list of albums of the same genre
G. Print out a list of albums recorded in the same year
H. Print out a list of albums having at least a certain rating
I. Print out a list of albums recorded by a particular artist
J. Print out a random playlist of song tracks
K. Print out the number of albums in the music library collection
L. Change the current music library
M. Add a new music library
Q. Quit the program.
Your choice: L
Please enter the index of the music library you want: 0
Music library 0 is the current music library.
Please choose from the following actions:
A. Initialize the music library
B. Add a new album to the collection.
C. Change the user rating of an album
D. Print out information about an album
E. Print out a list of all albums
F. Print out a list of albums of the same genre
G. Print out a list of albums recorded in the same year
H. Print out a list of albums having at least a certain rating
I. Print out a list of albums recorded by a particular artist
J. Print out a random playlist of song tracks
K. Print out the number of albums in the music library collection
L. Change the current music library
M. Add a new music library
Q. Quit the program.
Your choice: K
There is/are 0 album(s) in the Music library 0 collection.
Note that Music library 0 is a defaulted constructed empty MusicLibrary object and all of the operations in the example went to Music library 1, so Music library 0 has no albums in it.
04/17/07