PHP实现的简单排列组合算法应用示例实现的简单排列组合算法应用示例
本文实例讲述了PHP实现的简单排列组合算法应用。分享给大家供大家参考，具体如下：
一、问题：一、问题：
给你一个40斤的西瓜，给3个人分，有多少种分法？
二、二、PHP实现代码：实现代码：
<?php
$aa = range(1,40);
$bb = array();
foreach($aa as $k=>$val){
foreach($aa as $v){
foreach($aa as $vl){
$sum = $val+$v+$vl;
if($sum == 40){
$bb[$k][0] = $val;
$bb[$k][1] = $v;
$bb[$k][2] = $vl;
}
}
}
}
echo '<pre>';
print_r($bb);
exit;
?>
运行结果如下：
Array
(
[0] => Array
(
[0] => 1
[1] => 38
[2] => 1
)
[1] => Array
(
[0] => 2
[1] => 37
[2] => 1
)
[2] => Array
(
[0] => 3
[1] => 36
[2] => 1
)
[3] => Array
(
[0] => 4
[1] => 35
[2] => 1
)
[4] => Array
(
[0] => 5
[1] => 34
[2] => 1
)
[5] => Array
(
[0] => 6
[1] => 33
[2] => 1
)
[6] => Array
(
[0] => 7
[1] => 32
[2] => 1
)
[7] => Array
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