这里有新鲜出炉的PHP教程,程序狗速度看过来!
PHP(外文名: Hypertext Preprocessor,中文名:“超文本预处理器”)是一种通用开源脚本语言。语法吸收了C语言、Java和Perl的特点,入门门槛较低,易于学习,使用广泛,主要适用于web开发领域。PHP的文件后缀名为php。
这篇文章主要介绍了PHP实现的简单排列组合算法,结合具体应用实例分析了排列组合算法的实现与使用技巧,需要的朋友可以参考下
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:
给你一个40斤的西瓜,给3个人分,有多少种分法?
二、PHP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
- (
- [0] => 8
- [1] => 31
- [2] => 1
- )
- [8] => Array
- (
- [0] => 9
- [1] => 30
- [2] => 1
- )
- [9] => Array
- (
- [0] => 10
- [1] => 29
- [2] => 1
- )
- [10] => Array
- (
- [0] => 11
- [1] => 28
- [2] => 1
- )
- [11] => Array
- (
- [0] => 12
- [1] => 27
- [2] => 1
- )
- [12] => Array
- (
- [0] => 13
- [1] => 26
- [2] => 1
- )
- [13] => Array
- (
- [0] => 14
- [1] => 25
- [2] => 1
- )
- [14] => Array
- (
- [0] => 15
- [1] => 24
- [2] => 1
- )
- [15] => Array
- (
- [0] => 16
- [1] => 23
- [2] => 1
- )
- [16] => Array
- (
- [0] => 17
- [1] => 22
- [2] => 1
- )
- [17] => Array
- (
- [0] => 18
- [1] => 21
- [2] => 1
- )
- [18] => Array
- (
- [0] => 19
- [1] => 20
- [2] => 1
- )
- [19] => Array
- (
- [0] => 20
- [1] => 19
- [2] => 1
- )
- [20] => Array
- (
- [0] => 21
- [1] => 18
- [2] => 1
- )
- [21] => Array
- (
- [0] => 22
- [1] => 17
- [2] => 1
- )
- [22] => Array
- (
- [0] => 23
- [1] => 16
- [2] => 1
- )
- [23] => Array
- (
- [0] => 24
- [1] => 15
- [2] => 1
- )
- [24] => Array
- (
- [0] => 25
- [1] => 14
- [2] => 1
- )
- [25] => Array
- (
- [0] => 26
- [1] => 13
- [2] => 1
- )
- [26] => Array
- (
- [0] => 27
- [1] => 12
- [2] => 1
- )
- [27] => Array
- (
- [0] => 28
- [1] => 11
- [2] => 1
- )
- [28] => Array
- (
- [0] => 29
- [1] => 10
- [2] => 1
- )
- [29] => Array
- (
- [0] => 30
- [1] => 9
- [2] => 1
- )
- [30] => Array
- (
- [0] => 31
- [1] => 8
- [2] => 1
- )
- [31] => Array
- (
- [0] => 32
- [1] => 7
- [2] => 1
- )
- [32] => Array
- (
- [0] => 33
- [1] => 6
- [2] => 1
- )
- [33] => Array
- (
- [0] => 34
- [1] => 5
- [2] => 1
- )
- [34] => Array
- (
- [0] => 35
- [1] => 4
- [2] => 1
- )
- [35] => Array
- (
- [0] => 36
- [1] => 3
- [2] => 1
- )
- [36] => Array
- (
- [0] => 37
- [1] => 2
- [2] => 1
- )
- [37] => Array
- (
- [0] => 38
- [1] => 1
- [2] => 1
- )
- )
希望本文所述对大家PHP程序设计有所帮助。
来源: http://www.phperz.com/article/17/1026/350834.html