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'Or' function. (Read 846 times)
Ladle
'Or' function.
Oct 30th, 2009, 3:56am  
I'm using a number of is statements (which is already a bit clunky), so I'm trying to cut down the number I need by using ' || ' to give 2 possible values, but I get an error 'The operator || is undefined for argument types boolean, int. '

- what does it mean to define an operator? - is it the same as defining a variable? I thought || was global in processing..?

Thanks, L.

Code:


int hourNumber = getHour ();   
   
   if(hourNumber == 1 || 13) {
     clockHoursArray[1] = clockHoursArray[1] + 1; 
   }else if(hourNumber == 2 || 14){
     clockHoursArray[2] = clockHoursArray[2] + 1;
   }....
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blindfish
Re: 'Or' function.
Reply #1 - Oct 30th, 2009, 4:25am  
After an OR you have to include the full condition not just another value to check against:

Code:
 if(hourNumber == 1 || hourNumber == 13)


I remember making that mistake when I was starting out Wink

For multiple conditions you might also want to check out switch().
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Where is the what if the what is in why?
 
Ladle
Re: 'Or' function.
Reply #2 - Oct 30th, 2009, 6:46am  
Hehe, glad it's not just me for a change! Thanks that's sorted it, thanks:) L.
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Quark
Re: 'Or' function.
Reply #3 - Oct 30th, 2009, 7:30am  
We can reduce this to one if statement
Code:
int hourNumber = getHour ();   
   
   if(hourNumber > 12) {
      hourNumber -= 12; // Subtract 12
   }
   clockHoursArray[hourNumber]++;


We can even get rid of them all

Code:
int hourNumber = getHour ();   
   
   hourNumber = ((hourNumber -1) % 12)+1;
   clockHoursArray[hourNumber]++;


Smiley
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WWW  
liudr
Re: 'Or' function.
Reply #4 - Nov 1st, 2009, 10:52am  
Good codes Quark. Perfect way to simplify logic. It makes me think about K-map or K-diagram. I might oppose your second way since division takes more time (I'm confused, is it 1980?Smiley
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