#1
  1. No Profile Picture
    Registered User
    Devshed Newbie (0 - 499 posts)

    Join Date
    Nov 2012
    Location
    USA
    Posts
    1
    Rep Power
    0

    Help Writing my first program!


    Hello! This is one of the second programs I have been assigned to do, but as a beginner I am a little bit lost on where to start and how to go about creating this program.

    The program I have to write is to:
    Finding the day of the week corresponding to a specific date.
    -It has to read a date
    -Compute the corresponding day of the week N using the formula given below
    -Output the result (with the day of the week as a word not a number)

    I have to use Zeller's congruence equation
    h = ( q + (13*(m+1))/5 + K + K/4 + J/4 + 5*J)

    where:
    - J is the number of the century [i.e. the year / 100],
    - K the year within the century [i.e. the year % 100],
    - m the month,
    - q the day of the month,

    Note that in this formula:
    - the month indices are: March: 3, April: 4,...but with January being 13 and February being 14.
    - January and February are counted as part of the previous year

    h is a representation of the date as number of days since a starting time. It can then be converted into a day of the week using: N = h%7
    i.e. the remainder of the division of h by 7. N is the day of the week, with 0 being Saturday, 1 being Sunday,...

    As a beginner I am kind of lost. Could anyone give me any tips on how to go about writing this program? Thank You!
  2. #2
  3. Contributing User
    Devshed Newbie (0 - 499 posts)

    Join Date
    May 2012
    Location
    39N 104.28W
    Posts
    157
    Rep Power
    2
    I think you start with a date being supplied. This will probably be a user input (?) and we'll need to make some assumption about the format. For now, let's say that the date comes in American-style: mm/dd/yyyy.

    First split the user input string on "/" and assign month,day,year variables to the elements (after converting the strings to numbers):
    Code:
    mnth,dy,yr=map(int,datestring.split('/'))
    Now you want to get the variables in your designated algorithm from those 3 variables:
    Code:
    J=yr/100
    K=yr%100
    if mnth<3: mnth+=12
    m=mnth
    q=dy
    What more do you need?

IMN logo majestic logo threadwatch logo seochat tools logo