Julian date

[CPallini]

Vijjuuuuuuuuu........... wrote:

is there any function that converts this string str = "23/02/09 14:44:13" to julian date format in C or C++ .

Yes (and it possibly returns 09034 for your input). :rolleyes:

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
[My articles]

[Vijjuuu]

Thanks for the reply , but is there any function to do that ?

[CPallini]

You can roll your own one. What are your doubts while doing that? I recall for you the needed steps (if you aren't using MFC or ATL). You have to:

1. Parse the string to obtain day-of-month, month and year from the string.
2. Convert day-of-month and month to day-of-year.
3. Align properly year and day-of-year values in the resulting number.

In the above task, only point(2) is a bit tricky because of leap years. Using MFC or ATL would make your life easier.

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
[My articles]

modified on Monday, February 23, 2009 4:11 AM

[Garth J Lancaster]

it depends on what you mean by julian date - since the term is most often miss-used these days. If you mean 'the day number as a number starting counting from the 1st of Jan in the Current year', then you need to follow the advice of our trusted and esteemed colleague CPallini If you mean since an arbitrary point in time - such as is used by astronomers etc, ie 4713BC, then, part one of CPallini's response still applies, then you feed the results of the parse into something like :- http://www.silverglass.org/code/Date.html[^] 'g'

[Stephen Hewitt]

One possible solution is to use Boost[^]'s Date_Time[^] library.

Steve

[David Crow]

Vijjuuuuuuuuu........... wrote:

...to julian date...

Which one?

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[ky_rerun]

just use scansf grab the constituent parts and throw it into a SYSTEMTIME struct. Just rember that scanf assumes int * and the systemtime struct is all word size objects.

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a programmer traped in a thugs body

[ky_rerun]

DWORD Month,Day,Year,Hour,Minute,Second; //Initalize the values and the structure to zero Month = Day = Year = Hour = Minute = Second = 0; memset(&ST,0,sizeof(ST)); //Fix This use the stram reader so I can read the write size //Parse out the date with sscanf sscanf_s(Val.c_str(),"%d/%d/%d %d:%d:%d ",&Day,&Month,&Year,&Hour,&Minute, &Second); //reassign the values into the structure ST.wDay = (WORD) Day ; ST.wMonth = (WORD) Month ; ST.wYear = (WORD) Year ; ST.wHour = (WORD) Hour ; ST.wSecond = (WORD) Second; ST.wMinute = (WORD) Minute;

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a programmer traped in a thugs body

[Vijjuuu]

Thanks for replying me :)

[Vijjuuu]

Thanks for replying me