<?php
function fab($index)
{
//1 1 2 3 5
$a = 1;
$b = 1;
$c = 0;
for($i=0; $i<$index-2; $i++) {
$c = $a+$b;
$a = $b;
$b = $c;
}
return $c;
}
echo fab(7);
遞歸實現:
<?php
function fab($index)
{
//1 1 2 3 5
$a = 1;
$b = 1;
$c = 0;
for($i=0; $i<$index-2; $i++) {
$c = $a+$b;
$a = $b;
$b = $c;
}
return $c;
}
echo fab(7);
遞歸實現: