Calendar

1
Calendar

• Project 5 Wed, Nov 20, 2002

2
Specific Problems

• Deciding whether to print a single month or an
  entire year.
• The general layout of the calendar.
• Aligning the columns of dates.
• Getting the full name of the month.
• Centering the title of each month.
• Starting the first of the month in the correct
  column.
• Beginning a new week.

3
Deciding Whether to Print a Single Month or an
Entire Year

• If the user enters only a year, then the first
  character is a digit.
• If he enters a month and a year, then the first
  character is a letter.
• Therefore, get the first character, using get().
• Test it to see if it is a digit or a letter.
• Then put it back into the input stream, using
  putback().

4
The General Layout of the Calendar

• The first line should contain the month and year.
• The next line should contain the weekdays
  (abbreviated).
• Sun, Mon, , Sat.
• With underscores.
• The remaining lines contain the dates.

5
The General Layout of the Calendar

• How wide should each column be?
• Each column must contain the day name and
  separation from the neighboring columns.
• Should there be blank lines for separation?

6
Aligning the Columns of Dates

• If each column is 5 characters wide, exactly
  where should the date be placed within those 5
  characters?
• One-digit dates must be properly aligned with
  two-digit dates.
• How should we create the leading blanks?
• The dates must be aligned with the column
  headings.

7
Getting the Full Name of the Month

• The user enters the 3-letter abbreviation of the
  month name, e.g., "Nov".
• We must replace this with the full name, e.g.,
  "November".
• Create two arrays.
• monthAbbr "Jan", , "Dec"
• monthName "January", , "December"

8
Getting the Full Name of the Month

• Search the first array for a match.
• The full name of the month is in the same
  position of the second array.

9
Centering the Title on Each Month

• First, get the full name of the month.
• Use the size() string function to get the length
  of the month name.
• The title of the month, e.g., "November 2002",
  is 5 characters longer than the month name,
  because of the year.
• Subtract that width from the width of the
  calendar.
• Indent half the remainder.

10
Starting the First of the Month in the Correct
Column

• Create the first day of the month as a Date
  object.
• Use the function GetWeekday() to find out which
  day of the week it is.
• Search an array of weekdays for a match.
• dayName "Sunday", , "Saturday"
• Use this integer to indent the first row of dates.

11
Beginning a New Week

• Let a variable represent the column number, 0
  through 6.
• When the column number equals 6, start a new line
  after printing the date and reset the column
  number to 0.
• Or, begin a new line after printing a date for
  "Saturday".