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  1.  
  2. <?php
  3. function hitungNomorBit($angka, $nomorBit) {
  4.     // Konversi ke biner
  5.     $biner = decbin($angka);
  6.  
  7.     if ($nomorBit === 0) {
  8.         // Cari posisi bit 1 paling kiri (paling signifikan)
  9.         return strlen($biner) - strlen(ltrim($biner, '0'));
  10.     } elseif ($nomorBit === 1) {
  11.         // Hitung jumlah bit 1
  12.         return substr_count($biner, '1');
  13.     } elseif ($nomorBit === 2) {
  14.         return null;
  15.     }
  16.  
  17.     return null;
  18. }
  19.  
  20. // Contoh penggunaan
  21. echo "Untuk angka 13:\n";
  22. echo "Representasi Biner: " . decbin(13) . "\n";
  23. echo "hitungNomorBit(13, 0): " . hitungNomorBit(13, 0) . "\n";
  24. echo "hitungNomorBit(13, 1): " . hitungNomorBit(13, 1) . "\n";
  25. echo "hitungNomorBit(13, 2): " . (hitungNomorBit(13, 2) ?? 'null') . "\n";
  26. ?>
  27.  
Success #stdin #stdout 0.02s 25804KB
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Standard input is empty
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Untuk angka 13:
Representasi Biner: 1101
hitungNomorBit(13, 0): 0
hitungNomorBit(13, 1): 3
hitungNomorBit(13, 2): null
https://ideone.com/SrlQNP
language:
PHP (php 7.3.5)
created:
10 days ago
visibility:
public

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