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  1. <?php
  2. function hitungNomorBit($angka, $nomorBit) {
  3.     // Konversi manual ke biner (array dari kanan ke kiri)
  4.     $biner = [];
  5.     $n = $angka;
  6.     if ($n == 0) $biner[] = 0;
  7.     while ($n > 0) {
  8.         $biner[] = $n % 2;
  9.         $n = intdiv($n, 2);
  10.     }
  11.     // Kembalikan nilai bit ke-n jika ada, null jika tidak ada
  12.     if ($nomorBit >= 0 && $nomorBit < count($biner)) {
  13.         return $biner[$nomorBit];
  14.     }
  15.     return null;
  16. }
  17.  
  18. function cetakBitDanDesimal($angka, $nomorBit) {
  19.     $bit = hitungNomorBit($angka, $nomorBit);
  20.     if ($bit === null) {
  21.         echo "Bit ke-$nomorBit: NULL = NULL\n";
  22.     } elseif ($bit == 1) {
  23.         echo "Bit ke-$nomorBit: 1 = " . (2 ** $nomorBit) . "\n";
  24.     } else {
  25.         echo "Bit ke-$nomorBit: 0 = NULL \n";
  26.     }
  27. }
  28.  
  29. // test
  30. cetakBitDanDesimal(13, 0); // Bit ke-0: 1 = 1
  31. cetakBitDanDesimal(13, 1); // Bit ke-1: 0 = 
  32. cetakBitDanDesimal(13, 2); // Bit ke-2: 1 = 4
  33. cetakBitDanDesimal(19, 4); // Bit ke-4: 1 = 16
  34. cetakBitDanDesimal(9, 0);  // Bit ke-0: 1 = 1
  35. cetakBitDanDesimal(9, 1);  // Bit ke-0: 1 = 1
  36. cetakBitDanDesimal(9, 3);  // Bit ke-3: 1 = 8
  37. ?>
Success #stdin #stdout 0.03s 25364KB
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Bit ke-0: 1 = 1
Bit ke-1: 0 = NULL 
Bit ke-2: 1 = 4
Bit ke-4: 1 = 16
Bit ke-0: 1 = 1
Bit ke-1: 0 = NULL 
Bit ke-3: 1 = 8
https://ideone.com/9cVv0c
language:
PHP (php 7.3.5)
created:
5 days ago
visibility:
public

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