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From: owl <owl@rooftop.invalid>
Newsgroups: comp.os.linux.advocacy,sci.physics
Subject: Re: 2 lines, 2^2 states, easily modified to 3^2 states.
Date: Sat, 5 Aug 2017 05:42:11 +0000 (UTC)
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In comp.os.linux.advocacy Jeff-Relf.Me wrote:
> You ( Owl ) replied ( to me ):
> > >   int x = 0, F, B ;
> > >   while ( x++ < 100 ) printf("\n"), F = !(x%3), B = !(x%5), printf(
> > >     F && B ? "FizBuz" : F ? "Fiz" : B ? "Buz" : "%d", x );
> > 
> > Because nothing says "readable" and "maintainable" like a bunch of nested
> > ternary operations....  Try it with four values, where your state count 
> > goes to 16.  See how "readable" that is with your approach.
> 
> How about ? :
> 
>   int x = 0 ;  char *Say[4] = { "%d\n", "Buz\n", "Fiz\n", "FizBuz\n" };
>   while ( x++ < 100 ) printf( Say[ 2*!(x%3) + !(x%5) ], x );
> 
> 2 lines, 2^2 states, easily modified to 3^2 states.

Better, but you're still hard-coding values.  And 2^3 will need an 8-member
array and 2^4 will need 16.  See my other post showing 2^4.


> Full Answer:  http://Jeff-Relf.Me/FizBuz.HTM 
> 
> The I/O is the limiting factor, not "x%3", so:
> 
>   int x = 0 ;  char *Say[4] = { "%d\n", "Buz\n", "Fiz\n", "FizBuz\n" };
>   while ( x++ < 100 ) printf( Say[ 2*!(x%3) + !(x%5) ], x );
> 
> 2 lines, 2^2 states, easily modified to 2^3 states:
> 
>    4*!(x%3) + 2*!(x%5) + !(x%7)
> 

You're still limited by just having printf() pointing into an array
of strings.  I use an array of function pointers so that you can do
something other than printf() -- or in addition to printf() --
for different combinations.

For example, here a match on all four values calls zenity to
display a dialog alerting on a match:

http://imgur.com/a/rHRmP

/*void onetwofoureight(int x){printf("FizzBuzzGoozKaaz\n");}
*/
void onetwofoureight(int x)
{
   char cmd[100]={0};
   printf("FizzBuzzGoozKaaz\n");
   sprintf(cmd,"zenity --info --text=\"Found a FizzBuzzGoozKaaz at %d\"",x);
   system(cmd);
}