- Task Calendar Project Requirements Write A Program Which Can Be Used As A Calendar It Must Provide The Following Func 1 (51.24 KiB) Viewed 10 times
- Task Calendar Project Requirements Write A Program Which Can Be Used As A Calendar It Must Provide The Following Func 2 (186.55 KiB) Viewed 10 times
- Task Calendar Project Requirements Write A Program Which Can Be Used As A Calendar It Must Provide The Following Func 3 (157.6 KiB) Viewed 10 times
- Task Calendar Project Requirements Write A Program Which Can Be Used As A Calendar It Must Provide The Following Func 4 (73.87 KiB) Viewed 10 times
Task: Calendar Project Requirements: Write a program which can be used as a calendar. It must provide the following functions: 1. When the program starts, it prints a calendar for current year/month on the screen as follows: April 2014 ***** ******* SU MO TU WE TH FR SA 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 2. On this interface, you can do one of the following operations:
Press 'N': Show the calendar for the next month; Press 'P': Show the calendar for the previous month; Press 'C': Input year and month, the program will show the calendar as you inputted; Press 'A': Input year/month/day, then input a description, it will add an event to the calendar. Press 'L': Show all events you have created, each one with an ID; Press 'D': Input event ID, delete the event with this ID; Press 'S': Input a file name, save the events you have created in this calendar program to a file on the disk; Press 'R': Input a file name, load the events you have saved; Press 'Q': Exit the program. Implementation Step 1: Create the program skeleton You need to create a class named Calendar, which have public member function called void Calendar::Run(). Create an object of this Calendar class and call Run() in your main function. Calendar class should have other member functions, for example: void Calendar::Draw() - Used for displaying the calendar for the current month; void Calendar::Run() - the Calendar driver, accept user input and perform corresponding actions; Also create member functions for each operation, for example Calendar::Next Month(), Calendar::Previous Month(), Calendar::CreateEvent(), etc. In this step, you may just print a string for each operation. The actual program logic will be added to the member function in Step 3. Step 2: Create the data structures You need a Date class, used for storing the date information (Year, Month, Day) You need an Event class, used for storing the event information (Date, Description) So, in your Calendar class, you need to have one Date object for storing the current date and a vector of Event class to store the Events you created. For the Date class, you should write a constructor to initialize the object to the current date. You can use the following sample code to get the current date: #include <ctime> int year, month, day; time_t t = time(0); struct tm * now = localtime(&t); year = now->tm_year + 1900;
month = now->tm_mon + 1; day = now->tm_mday; You may also need to create some member functions for accessing the private member variables, eg: Date::GetYear(), Date::Get Month(), etc. Step 3: Implement Calendar::Draw() You may need the following information to help you: (1) How to determine the day of the week Use the following formulation: // Calculate the week for the first day in this month int y, c, m; if (month == 1 || month == 2) { y = (year - 1) % 100; c = (year - 1)/100;; m = month + 12; y = year % 100; c = year / 100; m = month; } int week = = ((y+y/4+c/4-2*c+ 26 (m + 1) / 10) % 7 + 7) % 7; if the calculated week equals to 0, it is Sunday; if it equals to 1, it is Monday, and so on. (2) How to determine the number of days in February Use the following code sample: bool leap = false; if ((year % 4 == 0) && (year % 100 != 0) || (year % 400 == 0)) leap = true; If it is a leap year, the number of days in February should be 29. Step 4: Implement other date related member functions in the Calendar class. These functions are relatively easy to implement. Just call the member functions of the date object to change the value of the date object inside the Calendar object. Step 5: Implement the event related functions in the Calendar class For Create Event: Prompt the user to input related information (date and description for the event), create a new Event object and push it to the events vector in Calendar class; For List Event: Traverse the events vector and print the events information. For Delete Event: Prompt the user to input an event ID (which is the subscript of the event in the events vector plus one), remove the related event in the events vector. } else {
Step 6: Save and Load functions Use fstream to save and load text files, you can use ifstream and ofstream to make your life easier. In the file, save the year, month, day and description of the event line by line. When loading the file, use a loop to read back all these information and create Event objects, push the Event objects to the events vector. Don't forge to close the file stream objects after using them. Final Step: Optimize your program You may find that your code becomes ugly after finishing these steps. For example, you may find some of the function/variable names are not easy for understanding; or you have too much duplicated code which should be encapsulate as functions or classes. Try your best to make your program better./