Chapter 11: Programming ProjectsΒΆ

 1. You are to create an interactive program that will
    present the following menu.

    0: Quit
    1: Add an Event
    2: View Events

    An Event is a structure or class as follows:

    long julianDate;    // the date the event is scheduled
                        // for
    long theTime;       // the time the event is scheduled
                        // for
    char theEvent[256]; // the statement about the event

    This program will be written in C++ and you will create
    the following C++ classes.

    CMenu - stores a list of menu items; presents those
            menu items on the screen; reads a selected menu
            item and returns an integer value representing
            the item selected.

    CDateTime - acquires the current date and time from the
                system; keeps the date in gregorian and
                julian formats; holds a string that
                represents the current date, i.e.
                "Monday, November 27, 1995"; holds the time
                in hh:mm:ss format and in twenty-four hour
                format.  Overload the following operators:

         + : adds a specified number of days to a julian
             date.
         - : substracts a specified number of days from a
             julian date.

    CDocument - opens a disk file and stores or retrieves
                data from the file depending upon which
                method of the class is called. The
                constructor is passed the name of the file
                to open, if the file does not exist then it
                is created.  The file is assumed to always
                be a binary data file.  This class holds
                the data for the events.  Overload the
                following operators:

         ++ : move to next item in document
         -- : move to previous item in document
         +  : add a new item to the document
         -  : delete an item from the document

    CView - displays data on the screen, one screen at a
            time; supports the input of 'N' or 'n' for next
            screen and 'P' or 'p' for previous screen;
            also, 'q' or 'Q' for quit which returns back to
            the main menu.

    In order for the program to obtain the current date and
    time from the operating system.  The date and time can
    be obtained by calling the  **time()** and
     **localtime()** functions. The following is a
    sample program that obtains the date and time from the
    system:

    #include
    #include types.h>
    #include <time.h>

    main()
    {
    struct tm *ptr;
    int nseconds;

         nseconds = time( (time_t)NULL );
         ptr = localtime( &nseconds );
         printf("\nptr->tm_sec = %d",ptr->tm_sec);
         printf("\nptr->tm_min = %d",ptr->tm_min);
         printf("\nptr->tm_hour = %d",ptr->tm_hour);
         printf("\nptr->tm_mday = %d",ptr-tm_mday);
         printf("\nptr->tm_mon = %d",ptr->tm_mon);
         printf("\nptr->tm_year = %d",ptr->tm_year);
         printf("\nptr->tm_wday = %d",ptr->tm_wday);
         printf("\nptr->tm_yday = %d",ptr->tm_yday);
         printf("\nptr->tm_isdst = %d",ptr->tm_isdst);
         printf("\n");
    }

    The structure, <B>struct tm<B>, has the following
    layout:

    struct tm
    {
         int tm_sec;    /* seconds after the minute ( 0 - 59 ) */
         int tm_min;    /* minutes after the hour ( 0 - 59 ) */
         int tm_hour;   /* hours since midnight ( 0 - 23 ) */
         int tm_mday;   /* day of the month ( 1 - 31 ) */
         int tm_mon;    /* month of the year ( 0 - 11 ) */
         int tm_year;   /* years since 1900 */
         int tm_wday;   /* days since Sunday ( 0 - 6 ) */
         int tm_yday;   /* day of the year ( 0 - 365 ) */
         int tm_isdst;  /* daylight savings time flag */
                        /* ( 1 = dst ) */
    };

 2. Write a program that maintains a list of contacts that
    you have made at various businesses.  The program will
    be menu driven and present the following menu:

    1. Add a contact
    2. Show contacts
    3. Quit application.

    The data held for each contact should be as follows:

Field              Type
-----------------------------
First Name         CString
Last Name          CString
Title              CString
Company            CString
Company Type       CString
Address            CString
Address2           CString
City               CString
State              CString
Zip                CString
Voice Phone        CString
Fax Phone          CString
Home Phone         CString
Home Fax Phone     CString
E-Mail Address     CString
Last Contact       CDateTime

    The following classes need to be developed for the
    application:


    CMenu - stores a list of menu items; presents those
            menu items on the screen; reads a selected menu
            item and returns an integer value representing
            the item selected.

    CDateTime - acquires the current date and time from the
                system; keeps the date in gregorian and
                julian formats; holds a string that
                represents the current date, i.e.
                "Monday, November 27, 1995"; holds the time
                in hh:mm:ss format and in twenty-four hour
                format.  Has a constructor that is
                initialized with the month, day, and year
                for a specified date.  Overload the
                following operators:

         + : adds a specified number of days to a julian
             date.
         - : substracts a specified number of days from a
             julian date.

    CDocument - opens a disk file and stores or retrieves
                data from the file depending upon which
                method of the class is called. The
                constructor is passed the name of the file
                to open, if the file does not exist then it
                is created.  The file is assumed to always
                be a binary data file.  This class
                holds the data that is being managed.
                Overload the following operators:

         ++ : move to next item in document
         -- : move to previous item in document
         +  : add a new item to the document
         -  : delete an item from the document

    CView - displays data on the screen, one screen at a
            time;  supports the input of 'N' or 'n' for
            next screen and 'P' or 'p' for previous screen;
            also, 'q' or 'Q' for quit which returns back to
            the main menu.

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