c语言数组排序_php数组排序几个程序实例

更新时间:2017-08-20    来源:C语言    手机版     字体:

【www.bbyears.com--C语言】

 【选择排序:第二个数至第n个数分别与第一个数比较,进行交换,第三个数至第n个数分别与第二个数比较,进行交换,直到排完】

 代码如下

function selectSort($arr,$style)
             {
                 $temp=0;
                 for($i=0;$i                  {
                     for($j=$i+1;$j                      {
                         if($style=="bts") $op=$arr[$i]<$arr[$j];
                         else if($style=="stb") $op=$arr[$i]>$arr[$j];
                         if($op)
                         {
                             $temp=$arr[$i];
                             $arr[$i]=$arr[$j];
                             $arr[$j]=$temp;
                         }
                     }
                 }
                 foreach ($arr as $key => $value)
                 {
                     echo $value.",";   
                 }
             }
             $arr1=array(21.5,33,90,7,-4,5,55,11);
             selectSort($arr1,"stb");

【默认传递的是值,不是地址。如果在$arr前加个&,则和$arr1指向同一个地址,函数外的$arr1也被排好了】

 代码如下

function maoPao($arr,$style)    {
                 $temp=0;
                 for($i=0;$i                  {
                     for($j=0;$j                      {
                         if($style=="bts") $op=$arr[$j]<$arr[$j+1];
                         else if($style=="stb") $op=$arr[$j]>$arr[$j+1];
                         if($op)
                         {
                             $temp=$arr[$j];
                             $arr[$j]=$arr[$j+1];
                             $arr[$j+1]=$temp;
                         }
                     }
                 }
                 foreach ($arr as $key => $value)
                 {
                     echo $value.",";   
                 }
             }
             $arr1=array(101,101,-9,-8,0,76,1,57,43,90,23,-56);
             maoPao($arr1,"stb");//small to big

 

【插入排序:第二个与第一个比较,交换,第三个与前两个比较,交换。。。。第n个与前n-1个比较,交换】

 代码如下

function insertSort($arr,$style)
             {
                 $temp=0;
                 for($i=1;$i                  {
                     for($j=0;$j<$i;$j++)
                     {
                         if($style=="bts") $op=$arr[$j]<$arr[$i];
                         else if($style=="stb") $op=$arr[$j]>$arr[$i];
                         if($op)
                         {
                             $temp=$arr[$j];
                             $arr[$j]=$arr[$i];
                             $arr[$i]=$temp;
                         }
                     }
                 }
                 foreach ($arr as $key => $value)
                 {
                     echo $value.",";   
                 }
             }
             $arr1=array(4,7,0,-7,1,14,5);
             insertSort($arr1,"bts");

本文来源:http://www.bbyears.com/asp/34982.html