data base help.
For Project you will develop a simple database system. The database is to handle multiple records, each composed of several fields. The database will store its information to a file, addition and deletion of records, field modifications, and it will allow users to sort records based on the selected keys, and produce reports (output) according to predefined criteria.
- A database is a collection of information, or data, that you can organize, update, sort, search through, and print as needed. A database does not just hold information; you use a database to organize and analyze information so that you understand its significance.
- A database file consists of one or more records. Each record holds all the information about one subject item. In C++, the class data type provides an efficient way to represent and manipulate records.
- Each piece of information in a record is called a field. Fields store the data that has been entered or calculated. In C++, fields are nothing more than the member variables defined for a particular class.
Given the requirements as a rough specification, you are to design the classes and implement the database. So you can consider the requirements below as an outcome from a meeting with a client. You are in full control of the choice of data structures (except the main data structure of a Binary Search Tree, more detail below), algorithms, internal file format, and detailed user interface scheme.
Requirements are listed with R:
You are designing and implementing a database for the Academy Award winners.
R1/R2: You are to read in information from two files.
R1: You will read in actor-actress.csv which is formatted as a csv file (Ask the user for the file name). Then place the items in a Binary Search Tree, sorted by name.
This is a common format and is comma separated (instead of being on separate lines). So you will have comma’s between the values. Blank values will just have a comma noting to go to the next field. (so you may have value,, indicating a blank field.) Each line ends in a newline, not a comma. If you want to view the file, often this will be opened by a spreadsheet unless you specifically open it with a text editor. Do not open it with Microsoft Word, as this may change the format. Consider using getline with three parameters, as an easy way to read in files The first line of a CSV file notes the data descriptions as follows:
The Winner field has a one if they won and a zero if they did not win.
R2: Then you will read in information about the movies (called pictures by the Academy of Motion Pictures) that have won best picture award. Place these items in a Binary Search Tree, sorted by name. This is also formatted as a .csv file
The first line of pictures.csv contains the data fields including:
R3/R4: Choose either the movie or actor database and add a record
R5/R6: Choose either the movie or actor database, search for a record, and modify the fields.
R7/R8: Choose either the movie or actor database, search for a record and delete the fields.
R9/R10: Choose either the movie or actor database andsort by any single (sortable) field
R11/R12: Choose either the movie or the actor database and work on complete search on any “complete” searchable field. It is unlikely that you would have an exact match on an entire description, so that would not be listed to search.
R13/R14: Choose either the movie or the actor database and work on partial search on any searchable field. A partial search is any sub string within a field.
R15/R16: Choose either the movie or actor database, ask for a file name, and print out a .csv file of the latest database (after adds, deletes or modifies). Remember that the first line of a .csv file lists the name of the fields separated with commas, ending in a newline. Then the following lines are the information from the fields separated with commas, ending in a newline.
Database overall management
- Use a text based menu for users to choose available features. Program should have a main menu at the beginning and sub menus depending on the task.
- Each component of the overall program should be fairly modular.
- Each menu item, for example, should be a separate function. The menu feature should be handled by a separate function and not by main( ).
- Program should be fairly fault tolerant of user input (both when the user is entering data, and making menu choices). Provide appropriate user prompts and on-screen directions
- Split the program into multiple files based on the roughly categorized functionality.
Data Retrieval and Modification
- Users should be able to search records based on the field information in two modes: exact and contains. For example, search “Justin”. Then under the search sub menu, users have to pick the search mode (exact or contains) and the field. (Fields should be listed out in another menu, so the user doesn’t need to remember a specific field name.
- Quite often, searches may generate a relatively big output. Users should be able to search again within the search result (secondary search) or start all over again from scratch (new search).
- Since the entire data is structured in a Binary Search Tree of names, any search (except name of movie or actor) will have to traverse the entire tree and search through the designated fields in every node of the tree.
- There should be no restriction to the number of records in the database. So, in other words, you should not consider a fixed array for the record data structure.