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in Technique[技术] by (71.8m points)

php 2的n次方

例:1,2,4,8,16,32,...,a,b,c
比如1+2=3,4+8=12,...,a+b+c=n,给出n,如何求出a,b,c


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function decimalismtobinary($number, &$arr=[])
{
  array_push($arr, $number%2);
  $number = floor($number/2);
  if ((int)$number === 0) {
    return;
  }
  decimalismtobinary($number, $arr);
  foreach($arr as $k => &$v) {
      if((int)$v === 0) {
          unset($v);
          continue;
      }
      $v = 2**$k;
  }
  return $arr;
}

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