Question

我想检查我的数字是否是斐波那契？

<Host name="localhost"  appBase="webapps"
            unpackWARs="true" autoDeploy="true">

        <!-- SingleSignOn valve, share authentication between web applications
             Documentation at: /docs/config/valve.html -->
        <!--
        <Valve className="org.apache.catalina.authenticator.SingleSignOn" />
        -->

        <!-- Access log processes all example.
             Documentation at: /docs/config/valve.html
             Note: The pattern used is equivalent to using pattern="common" -->
        <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
               prefix="localhost_access_log" suffix=".txt"
               pattern="%h %l %u %t &quot;%r&quot; %s %b" />
			<Context docBase="Booking" path="/Booking" reloadable="true"   />
  </Host>

Answer 1

<?php

function getFibonicciIndex($number)
{
    $log_base = (1+sqrt(5))/2;
    $index = log(($number*sqrt(5)-(1/2)), $log_base);
    return floor($index)+1;
}
function getFibonicciNumber($term)
{
    $a = (1+sqrt(5))/2;
    $b = (1-sqrt(5))/2;
    $fibonicci_number = (pow($a, $term)-pow($b, $term))/sqrt(5);
    return $fibonicci_number;
}
$number = 14;
$index = getFibonicciIndex($number);
$index_value = getFibonicciNumber($index);
echo ($number == $index_value) ? "yes" : "no";

//此逻辑实现了查找斐波纳契数列及其索引的最佳规则。首先，我们假设给定的没有。是Fibonacci系列的一部分，并尝试获得索引..然后对于给定的索引，我们计算斐波那契数并将其等于验证

如何检查给定的数字是否是Fibonacci数？

1 个答案: