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php 两表合并成新表并且有序排列

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Release: 2016-06-08 17:26:39
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<script>ec(2);</script>

/**
la (3,5,8,11)
lb(2,6,8,9,11,15)
合并为lc,有序排列。
用php实现,不能用sort之类的函数!!!!
**/

class union {
    var $lista = array();
    var $listb = array();
    var $listc = array();
   
    function getlenght($arr) { //获得表长度
        return count($arr);
    }
   
    function getelement($arr, $n) { //获取表中第n个元素,返回
        return $e = $arr[$n] ? $arr[$n] : '';
    }
   
    function listinsert($arr, $e) { //表末尾插入元素
        $arr[] = $e;
        return $arr;
    }
   
 
}
$phpig = new union();
$lista = $phpig->lista = array(3, 5, 8, 11);
$listb = $phpig->listb = array(2, 6, 8, 9, 11, 15);
$listc = $phpig->listc;
$lena = $phpig->getlenght($lista); //取得表大小
$lenb = $phpig->getlenght($listb);
$i = $j = 0;
while($i     $ea = $phpig->getelement($lista, $i);
    $eb = $phpig->getelement($listb, $j);
    if($ea         $listc = $phpig->listinsert($listc, $ea);
        ++$i;
    } else {
        $listc = $phpig->listinsert($listc, $eb);
        ++$j;
    }
}
while($i     $ea = $phpig->getelement($lista, $i);
    $listc = $phpig->listinsert($listc, $ea);
    ++$i;
}
while($j     $eb = $phpig->getelement($listb, $j);
    $listc = $phpig->listinsert($listc, $eb);
    ++$j;
}

print_r($listc);
?>

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