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Re: Simple Programming Challenge

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Pancho <Pancho.Jones@protonmail.com> writes:
> On 11/12/25 17:29, Pancho wrote:
>> On 11/12/25 16:41, Joe Fantastic wrote:
>>> Too many additions.
>>>
>> #include <stdio.h>
>> #include <stdlib.h>
>> int main()
>> {
>>    int i=1;
>>    while (i < 990)
>>    {
>>      printf( "%d\n", i++);
>>      printf( "%d\n", i++);
>>      printf( "%s\n",  "Fizz"); i++;
>>      printf( "%d\n", i++);
>>      printf( "%s\n", "Buzz"); i++;
>>      printf( "%s\n",  "Fizz"); i++;
>>      printf( "%d\n", i++);
>>      printf( "%d\n", i++);
>>      printf( "%s\n",  "Fizz"); i++;
>>      printf( "%s\n", "Buzz"); i++;
>>      printf( "%d\n", i++);
>>      printf( "%d\n", i++);
>>      printf( "%s\n",  "Fizz"); i++;
>>      printf( "%d\n", i++);
>>      printf( "%s\n",  "FizzBuzz"); i++;
>>    }
>>    printf( "%d\n", i++);
>>    printf( "%d\n", i++);
>>    printf( "%s\n",  "Fizz"); i++;
>>    printf( "%d\n", i++);
>>    printf( "%s\n", "Buzz"); i++;
>>    printf( "%s\n",  "Fizz"); i++;
>>    printf( "%d\n", i++);
>>    printf( "%d\n", i++);
>>    printf( "%s\n",  "Fizz"); i++;
>>    printf( "%s\n", "Buzz"); i++;
>> }

l-)

> whoops 12 and 13 the wrong way around. No task is too small, for me to
> fuck up :o).

#include <stdio.h>

int main(void) {
  static const char *f[] = {
    "fizzbuzz\n",
    "buzz\n",
    "fizz\n",
    "%d\n",
  };    
  unsigned r = 2;
  for(int i = 1; i <= 1000; i++) {
    printf(f[!(r & 4681) + (!(r & 1057) << 1)], i);
    r <<= 1;
    r |= r >> 15;
  }
  return 0;
}

If you hate additions then ‘+’ in the middle could be ‘|’, but x86-64
GCC doesn’t spot the optimization to lea if you do tha

-- 
https://www.greenend.org.uk/rjk/

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Simple Programming Challenge Joe Fantastic <jf@linux.rocks> - 2025-11-12 15:19 +0000
  Re: Simple Programming Challenge "Joel W. Crump" <joelcrump@gmail.com> - 2025-11-12 10:31 -0500
    Re: Simple Programming Challenge John Ames <commodorejohn@gmail.com> - 2025-11-12 08:07 -0800
    Re: Simple Programming Challenge ram@zedat.fu-berlin.de (Stefan Ram) - 2025-11-12 16:18 +0000
      Re: Simple Programming Challenge Joe Fantastic <jf@linux.rocks> - 2025-11-12 16:41 +0000
        Re: Simple Programming Challenge Pancho <Pancho.Jones@protonmail.com> - 2025-11-12 17:29 +0000
          Re: Simple Programming Challenge Pancho <Pancho.Jones@protonmail.com> - 2025-11-12 17:33 +0000
            Re: Simple Programming Challenge Richard Kettlewell <invalid@invalid.invalid> - 2025-11-13 00:00 +0000
              Re: Simple Programming Challenge Pancho <Pancho.Jones@protonmail.com> - 2025-11-13 10:45 +0000
        Re: Simple Programming Challenge Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-12 23:30 +0000
        Re: Simple Programming Challenge ram@zedat.fu-berlin.de (Stefan Ram) - 2025-11-13 13:24 +0000
          Re: Simple Programming Challenge Ralf Fassel <ralfixx@gmx.de> - 2025-11-13 16:16 +0100
      Re: Simple Programming Challenge Fritz Wuehler <fritz@spamexpire-202511.rodent.frell.theremailer.net> - 2025-11-12 18:37 +0100
    Re: Simple Programming Challenge Brock McNuggets <brock.mcnuggets@gmail.com> - 2025-11-12 20:05 +0000
      Re: Simple Programming Challenge "Joel W. Crump" <joelcrump@gmail.com> - 2025-11-12 15:30 -0500
        Re: Simple Programming Challenge Brock McNuggets <brock.mcnuggets@gmail.com> - 2025-11-12 20:50 +0000
  Re: Simple Programming Challenge John McCue <jmclnx@gmail.com.invalid> - 2025-11-12 17:22 +0000
    Re: Simple Programming Challenge c186282 <c186282@nnada.net> - 2025-11-12 23:57 -0500
  Re: Simple Programming Challenge Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-12 23:24 +0000

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