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冒泡排序法演示
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PHP的简易冒泡法代码分享

Jun 13, 2016 am 11:58 AM
php thing code Revise bubble share Base copy guide of concise master

很基础的东西,感觉代码还不够简洁,希望高手指导修改

复制代码 代码如下:


function BubbleSort($str){
for($i=0;$ifor ($k=count($str)-2;$k>=$i;$k--){//将这个值向前冒泡;
if($str[$k+1]$tmp=$str[$k+1];
$str[$k+1]=$str[$k];
$str[$k]=$tmp;
}
}
}
return $str;
}
//以下是测试
$str=array(5,8,2,6,10,0,3,12,11);
print_r(BubbleSort($str));
?>


php 冒泡排序2
基本概念是:依次比较相邻的两个数,将小数放在前面,大数放在后面。即首先比较第1个和第2个数,将小数放前,大数放后。然后比较第2个数和第3个数,将小数放前,大数放后,如此继续,直至比较最后两个数,将小数放前,大数放后。重复以上过程,仍从第一对数开始比较(因为可能由于第2个数和第3个数的交换,使得第1个数不再小于第2个数),将小数放前,大数放后,一直比较到最大数前的一对相邻数,将小数放前,大数放后,第二趟结束,在倒数第二个数中得到一个新的最大数。如此下去,直至最终完成排序。
  由于在排序过程中总是小数往前放,大数往后放,相当于气泡往上升,所以称作冒泡排序。
  用二重循环实现,外循环变量设为i,内循环变量设为j。外循环重复9次,内循环依次重复 9,8,...,1次。每次进行比较的两个元素都是与内循环j有关的,它们可以分别用a[j]和a[j+1]标识,i的值依次为1,2,...,9,对于每一个i, j的
值依次为1,2,...10-i。

复制代码 代码如下:


function asc($a)
{
for($i=0;$i{
for($j=0;$j{
if($a[$j]>$a[$j+1])
{
$tmp=$a[$j+1];
$a[$j+1]=$a[$j];
$a[$j]=$tmp;
}
}
}
print_r($a);
}
$a = array(9,8,17,6,26,4,33,2,1);
print_r(asc($a));
?>


function desc($a)
{
$c=array();
for($i=count($a)-1;$i>0;$i--)
{
for($j=0;$j{
if($a[$j]{
$tmp=$a[$j+1];
$a[$j+1]=$a[$j];
$a[$j]=$tmp;
}
}
}
print_r($a);
}
$arr=array(33,24,56,55,59);
desc($arr);
?> 


PHP冒泡排序法演示
以前面试的时候考官出的笔试题,觉得比较XX,写程序应该是在计算机上面,而不是在笔头上。
PHP程序文件sort_bubble_up.php

复制代码 代码如下:



冒泡排序法演示


冒泡排序法演示



//随机生成数组
$arr=array();
echo '';
echo '';
for($i=0;$i$arr[$i]=rand();
echo "";
}
//进行冒泡法排序
for($i=9;$i>0;$i--){
echo '';
for($j=0;$jif($arr[$j]$tmp=$arr[$j];
$arr[$j]=$arr[$j+1];
$arr[$j+1]=$tmp;
}
echo '';
for($k=0;$kswitch($k){
case $j : echo '";
}
echo '';
}
}
//显示排序结果
echo '';
echo '';
for($i=0;$iecho "";
}
echo '';
?>
初始值
\$arr[$i]={$arr[$i]}
第'.(10-$i).'次
'; break;
case $j+1 : echo '
'; break;
default : echo '
';
}
echo "\$arr[$k]={$arr[$k]}
结果
\$arr[$i]={$arr[$i]}



样式表文件sort.css

复制代码 代码如下:


h1{text-align: center; color: blue;}
table{font-size: 12px; font-family: arial; background-color: black; text-align: center;}
td{background-color: white;}
.base{background-color: #0FF;}
.light{background-color: #0DD;}
.title{background-color: #3FF; text-align: center;}

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