PureBasic Forums - English

Posted: **Wed Jul 14, 2010 9:31 pm**

Thorium wrote:...because they are not supported outsite of if statements. So you should not use them in formulas at all.

I did use the '=' sign in my definition of a leap year, without the IF statement. For those just turning to PureBasic, that IS confusing.

Posted: **Thu Jul 15, 2010 9:58 am**

With PureBasic working with boolean expressions is still very confusing. For example, this works:

Code: Select all

Procedure.i LeapYear(Year.i)
  ;returns:
  ;  - True (1) If the given year is a leapyear
  ;  - False (0) if the given year is not a leapyear
  ProcedureReturn ((Year % 4) = 0) And ((Year % 100) <> 0) Or ((Year % 400) = 0)
EndProcedure
Debug LeapYear(2008)
Debug LeapYear(2009)

May it does work, but it is not supported AFAIK. What you're doing with the procedurereturn is just an alternative way to write this:

Original line:

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ProcedureReturn ((Year % 4) = 0) And ((Year % 100) <> 0) Or ((Year % 400) = 0)

Functional replacement:

Code: Select all

x = ((Year % 4) = 0) And ((Year % 100) <> 0) Or ((Year % 400) = 0)
ProcedureReturn x

Even if it (currently) works you should not do this, as it is not supported AFAIK.

Posted: **Thu Jul 15, 2010 4:35 pm**

@ bleuznl, I was starting to wonder if I did the right thing with the LeapYear procedure while going through this topic. Normally I test things thoroughly, and if they work, I assume the compiler supports it. Obviously, that assumption is not correct. Thanks for pointing this out to me.

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