the best way to do this...

[treyreese]

I'm trying to make a program where the user inputs the startmonth/startday and the endmonth/endday in the format like 1/1 2/1. What would be the best way to figure out how many days is inbetween the two dates?

[Yoni]

Try: difftime

[treyreese]

difftime is used for days or seconds and stuff?

[Yoni]

Yes, you got it! Enjoy.

[Adron]

I tend to turn times into time_t's internally since those are easy to use. Subtracting two time_t's to find a difference in days, hours, whatever, is easy.

[treyreese]

heh im confused with it, i have never really used time.h so i don't understand it

[iago]

Basically, convert both dates to the number of milliseconds since some arbitrary date, subtract them, and turn them back.  Look up time_t on Google for more information.

[Kp]

Basically, convert both dates to the number of milliseconds since some arbitrary date, subtract them, and turn them back.  Look up time_t on Google for more information.

time_t is in seconds, not milliseconds.

[iago]

Basically, convert both dates to the number of milliseconds since some arbitrary date, subtract them, and turn them back.  Look up time_t on Google for more information.

time_t is in seconds, not milliseconds.

Well, there's some time structure that's in milliseconds!

I've been using java.util.Time.getCurrentTimeInMillis() to much, I guess!

[Skywing]

Basically, convert both dates to the number of milliseconds since some arbitrary date, subtract them, and turn them back.  Look up time_t on Google for more information.

time_t is in seconds, not milliseconds.

Well, there's some time structure that's in milliseconds!

I've been using java.util.Time.getCurrentTimeInMillis() to much, I guess!

There is no C standard structure like that.

[Adron]

There is no C standard structure like that.

The closest common C structure I can think of is timeval with microseconds.

[Skywing]

There is no C standard structure like that.

The closest common C structure I can think of is timeval with microseconds.

That is POSIX and not C standard, though.

[Adron]

That is POSIX and not C standard, though.

That's why I said a common C structure. Most of the C compilers support POSIX, in some form, some parts of it. Can you think of any other common time structure with more than second accuracy?