4 examples of how many daffodils are implemented in PHP

What is the number of daffodils? Narcissus number refers to an n-digit number (n≥3), and the sum of the number of its digits on each bit is equal to its own. (ex: 1^3 + 3^3+ 5^3 = 153), this article collects 4 examples of how many daffodils are implemented in PHP. Example 1,php to achieve the number of daffodils: for ($q =1; $q <=9; $q + +) { for ($w =0; $w <=9; $w + +) { for ($e =0; $e <=9; $e + +) { if ($q * $q * $q + $w * $w * $w + $e * $e * $e = = 100* $q + 10* $w + $e) { echo "$q $w $e". "; } } } } ?> Copy Code Example 2,php to achieve the number of daffodils: function cube ($n) { return $n * $n * $n; } function Is_narcissistic ($n) { $hundreds = Floor ($n/100); Break up the Hundred $tens = Floor ($n/10)% 10; Break out 10-bit $ones = Floor ($n% 10); Split the bits. Return (BOOL) (Cube ($hundreds) +cube ($tens) +cube ($ones) = = $n); } for ($i = +, $i <, + + $i) { if (is_narcissistic ($i)) echo $i. " \ n "; } ?> Copy Code Example 3,php to achieve the number of daffodils: Armstrong number: A K-digit, and the sum of the number of its digits on each bit is equal to its own. (Example: 1^3 + 5^3 + 3^3 = 153) Class Armstrong { static function index () { for ($i = n, $i < 100000; $i + +) { echo Self::is_armstrong ($i)? $i. ' ' : ''; } } static function Is_armstrong ($num) { $s = 0; $k = strlen ($num); $d = Str_split ($num); foreach ($d as $r) { $s + = Bcpow ($r, $k); } return $num = = $s; } } Armstrong::index (); Copy Code Example 4,php to achieve the number of daffodils: PHP implements Narcissus number _bbs.it-home.org function Winter ($num) { if ($num <1000) { Define Bits $ge = $num% 10; Define 10-bit $ten = (($num%100)-$ge)/10; Define the Hundred /*floor rounding, ignoring all numbers after the decimal point */ $hundred =floor ($num/100); $sum 1= $ge * $ge * $ge + $ten * $ten * $ten + $hundred * $hundred * $hundred; if ($sum 1== $num) { return 1; } else{ return 0; } } else{ return-1; } } if (Winter (371) ==-1) { echo "number greater than 1000"; }else{ if (Winter (371)) { echo "Yes"; } else{ echo "No"; } } ?> Copy Code

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