# calculate day's between two dates

Discussion in 'C++' started by Tom, Mar 16, 2006.

1. ### TomGuest

calculate the number of days between two dates.

Tom, Mar 16, 2006

2. ### TomásGuest

Tom posted:

> calculate the number of days between two dates.

Step 1: Write the code

Step 2: Get a compiler

Step 3: Compile it

There's bucket-loads of reusable code out there for doing this, but I
presume you're some sort of student and you have to do it all by yourself
so that you learn from it.

-Tomás

Tomás, Mar 16, 2006

3. ### Jacek DziedzicGuest

Tom wrote:
> calculate the number of days between two dates.

What problem did you encounter then? I suppose you did
start on it, right?

- J.

Jacek Dziedzic, Mar 16, 2006
4. ### osmiumGuest

"Tom" writes:

> calculate the number of days between two dates.

Presuming this is a student exercise.....

Top down design is usually preferred but in this case I think it would be OK
to do bottom up. IOW, it isn't really design, it's a Topsy like growth from
the bottom up. You can surely do that for two dates in the same month,
right? Do that. Then consider adjacent months. where neither one of them
is February. Then allow for intervening months in the same year. Then
different years where neither year is a leap year. Then handle leap years
properly. Look in a good dictionary, the leap year rule might have more

After completing something like this sequence you will have learned a lot
and you can throw all that code away and write a nice pretty program that
does what you have been asked to do.

If this is not a student exercise, look up Julian day number.

osmium, Mar 16, 2006
5. ### Neil CeruttiGuest

On 2006-03-16, osmium <> wrote:
> "Tom" writes:
>> calculate the number of days between two dates.

>
> Presuming this is a student exercise.....
> <snip>
> If this is not a student exercise, look up Julian day number.

Or difftime.

--
Neil Cerutti
Low Self-Esteem Support Group will meet Thursday at 7 to 8:30
p.m. Please use the back door. --Church Bulletin Blooper

Neil Cerutti, Mar 16, 2006
6. ### osmiumGuest

"Neil Cerutti" wrote:

>> If this is not a student exercise, look up Julian day number.

>
> Or difftime.

I wouldn't recommend that, it only works for a restricted set of dates. A
baby boomer couldn't figure out how old he was in days.

osmium, Mar 16, 2006

Tom wrote: