PHP数据结构之直接插入排序

<?php
$array = array(13,15,6,10,20,6,3,19);

$count = count($array);

$n = $e = 0;

for($i = 1; $i < $count; $i++)

{

$tmp = $array[$i];

$j = $i;

while($array[$j-1] > $tmp){

$n++;

$e++;

$array[$j] = $array[$j-1];

$j--;

}

$array[$j] = $tmp;

}

print_r($array);

echo "共循环{$n}次，共执行{$e}次数据交换";

?>

执行结果为：

Array ( [0] => 3 [1] => 6 [2] => 6 [3] => 10 [4] => 13 [5] => 15 [6] => 19 [7] => 20 )
共循环15次，共执行15次数据交换