112 p2

Harold & Kumar Go to White Castle
2004
9
Fahrenheit 9/11
2004
8
There's Something About Mary
1998
9
Star Wars
1977
7
Harold & Kumar Go to White Castle
2004
4
Star Wars
1977
6

2004: Harold & Kumar Go to White Castle, rating = 6.5
2004: Fahrenheit 9/11, rating = 8
1998: There's Something About Mary, rating = 9
1977: Star Wars, rating = 6.5

movie title
year
rating
movie title
year
rating
...

year: movie title, rating = n

Too many movies specified.
The system can only handle 100 movies.
Giving up...

Use two classes to implement your rating system:

class Movie      // store each movie in a separate Movie object
class Movie_db   // store all the Movie objects in one Movie_db

Each should be in its own files:

movie.h
movie.cpp
movie_db.h
movie_db.cpp

In addition to these files, you will need to turn in a file containing your main() function:

main.cpp

I will provide sample tests for your program in the tests/p2 directory.

Each test consists on a single input file (with a name like t01) and a single corresponding output file (with a name like t01.out). If you copy these files to your directory, you can test your program as follows:

% movies < t01 > t01.myout 2> t01.myerr
% diff t01.myout t01.out
% diff t01.myerr t01.err
%

The program diff looks for differences in files. If there are differences it prints them. If there are no differences, it doesn't print anything.

Thus if you do the above for each test in the p1 test directory, and diff does not print anything, you pass all of my sample tests.

However, I will use tests that I don't post to grade your program, so it is a good idea to develop some of your own tests.

If you are programming using windows, every line in your program will contain an extra hidden character (the DOS standard is different than the UNIX standard). I will only post UNIX files. However, you can convert your DOS files to UNIX files using the commend dos2unix.

When too many different movies are entered, the program is suppose to print an error message and then do nothing else. The easiest way to achieve this is to call exit(1) after you print the error message. The exit() function immediately stops the programs. The 1 means that there was an error. The 1 is returned to the calling process (usually the shell). If you ever want to terminate a program that does not have an error, call exit(0).

Use the getline() function to read the title string. getline() will return 0 when called after all the input has been read. In other words, getline() returns 0 when it reads end of file (EOF).

while (getline(cin, title) != 0)   // while the getline did not return end of file
{
    // now read the year and the rating
    ...
}

Since the year and rating are integers, it is easiest to read them using the standard cin operator:

cin >> year;
cin >> rating;

A problem occurs when you combine getline() with cin >>. The problem is that the cin >> does not read the end of line marker ('\n') and thus the next time you call getline(), you read an empty line. Thus you have to manually read that end of line to get it out of your way:

cin >> year;
cin >> rating;
cin.ignore();

Windows warning: If you are programming in the microsoft windows world, this won't work. Windows has two characters at the end of each line. You can fix the problem by using the command dos2unix to turn your input files into UNIX like files (that is, with only a '\n' at the end of each line). It would not be a good idea to write your code so that it only works in the windows world because we will grade it in the UNIX world.

An alternative to using the above approach for reading the integer rating is to read the integer as a string and then convert the string to an integer. This approach is not as straightforward as the approach above, so you should only try it if you have extra time. Hint: read about the function atoi().

Sample input and output can be found in tests/p2.

/****
last name, first name
ecst_username@ecst.csuchico.edu
112 Program p2: Movie Database
****/

movie.h
movie.cpp
movie_db.h
movie_db.cpp
main.cpp