ЗАДАЧИ Python

ВОТ ССЫЛКА НА КНИГУ В КОТОРОМ ЭТИ ЗАДАНИЯ (EXERCISES №1.1 ....1.4) AND (PROGRAMMING PROJECTS 1.1....1.7), А НИЖЕ САМИ ЗАДАНИЯ ИЗ ТОЙ КНИГИ, НУЖНА ПОМОЩЬ ПОТОМУ ЧТО НЕ УСПЕВАЮ ИЗУЧАЯ ПАРАЛЛЕЛЬНО С++, А СДАВАТЬ НУЖНО В ТЕЧЕНИИ НЕДЕЛИ

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1.1 Complete the partial implementation of the Date class by implementing the
remaining methods: monthName(), isLeapYear(), numDays(), advanceBy(),and isValidGregorian(). The isValidGregorian() method should determine if the three components of the given Gregorian date are valid.

1.2 Add additional operations to the Date class:
(a) dayOfWeekName(): returns a string containing the name of the day.
(b) dayOfYear(): returns an integer indicating the day of the year. For ex-
ample, the rst day of February is day 32 of the year.
(c) isWeekday(): determines if the date is a weekday.
(d) isEquinox(): determines if the date is the spring or autumn equinox.
(e) isSolstice(): determines if the date is the summer or winter solstice.
(f) asGregorian(divchar = '/'): similar to the str() method but uses
the optional argument divchar as the dividing character between the three
components of the Gregorian date.

1.3 Implement a function named printCalendar() that accepts a Date object
and prints a calendar for the month of the given date. For example, if the
Date object passed to the function contained the date 11/5/2007, the function
should print

November 2007
Su Mo Tu We Th Fr Sa
1 2 3
4 5 6 7 8 9 10
11 12 13 14 15 16 17
18 19 20 21 22 23 24
25 26 27 28 29 30

1.4 Modify the Date() constructor to make each of the three arguments optional,
with an initial value of zero. When no argument is supplied to the constructor,
the object should be initialized to the current date. Hint: You will need to
use Python's date() function from the time.py module.


Programming Projects

1.1 A click counter is a small hand-held device that contains a push button and
a count display. To increment the counter, the button is pushed and the new
count shows in the display. Clicker counters also contain a button that can be
pressed to reset the counter to zero. Design and implement the Counter ADT
that functions as a hand-held clicker.

1.2 A Grab Bag ADT is similar to the Bag ADT with one dierence. A grab
bag does not have a remove() operation, but in place of it has a grabItem()
operation, which allows for the random removal of an item from the bag.
Implement the Grab Bag ADT.

1.3 A Counting Bag ADT is just like the Bag ADT but includes the numOf(item)
operation, which returns the number of occurrences of the given item in the
bag. Implement the Counting Bag ADT and defend your selection of data
structure.


1.4 The use of the Student File Reader ADT makes it easy to extract student
records from a text le no matter the format used to store the data. Implement
a new version of the ADT to extract the data from a text le in which each
record is stored on a separate line and the individual elds are separated by
commas. For example, the following illustrates the format of a sample le
containing three student records:
10015, John, Smith, 2, 3.01
10334, Jane, Roberts, 4, 3.81
10208, Patrick, Green, 1, 3.95


1.5 In the chapter, we dened and implemented the Student File Reader ADT for
extracting student records from an external source. We can dene and use a
similar ADT for output.
(a) Design a Student File Writer ADT that can be used to display, or store to
an output device, student records contained in a StudentRecord object.
(b) Provide an implementation of your ADT to output the records by display-
ing them to the terminal in a neatly formatted fashion.
(c) Provide an implementation of your ADT to output the records to a text
le using the same format described in the text.
(d) Design and implement a complete program that extracts student records
from a text le, sorts them by either student id or student name, and
displays them to the terminal using your ADT. The choice of sort keys
should be extracted from the user.


1.6 We can use a Time ADT to represent the time of day, for any 24-hour period,
as the number of seconds that have elapsed since midnight. Given the following
list of operations, implement the Time ADT.
 Time( hours, minutes, seconds ): Creates a new Time instance and ini-
tializes it with the given time.
 hour(): Returns the hour part of the time.
 minutes(): Returns the minutes part of the time.
 seconds(): Returns the seconds part of the time.
 numSeconds( otherTime ): Returns the number of seconds as a positive
integer between this time and the otherTime.
 isAM(): Determines if this time is ante meridiem or before midday (at or
before 12 o'clock noon).
 isPM(): Determines if this time is post meridiem or after midday (after
12 o'clock noon).
 comparable ( otherTime ): Compares this time to the otherTime to de-
termine their logical ordering. This comparison can be done using any of
the Python logical operators.
 toString (): Returns a string representing the time in the 12-hour format
hh:mm:ss. Invoked by calling Python's str() constructor.


1.7 Design and implement a TimeDate ADT that can be used to represent both
a date and time as a single entity.

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