请教各位一段算法的实现,嵌套判断
假设有两个数组$a[0],$a[1],$a[2]和$b[0],$b[1],$b[2]
//===========判断块开始
先是对$a[0]和$b[0]的大小判断,如果为true,结束所有判断,跳到another code brick;
如果为false
去判断$a[1]和$b[1]的大小,如果为true,结束所有判断,跳到another code brick;
如果为false,那么
最后判断$a[2]和$b[2]的大小,结束判断
//===========判断块结束
another code brick;
请问难道这种应该用不断的if嵌套么?
如果不是,那么应该怎样实现?
------解决方案--------------------
方法函数用数组管理, 循环判断数组,根据下标选调用函数
<br /> function f1(){<br /> echo 1;<br /> } <br /> function f2(){<br /> echo 2;<br /> } <br /> $fns=Array(f1,f2);<br /> $a= Array(3,2);<br /> $b=Array(2,3);<br /> foreach($a as $k => $v )<br /> if( $v > $b[$k] ) $fns[$k]();<br />
------解决方案--------------------
for($i=0; $i
if($a[$i] == $b[$i]) break;
$k = 0;
}
if($k) {
another code brick;
}
------解决方案--------------------
你这个感觉像不久前有人问对提交内容逐个判断的帖子,只不过那个是遇到false就结束判断
另一种思路:
<br /> <?php<br /> function comp($n, $m)<br /> {<br /> if ($n ==$m) return True;<br /> else return False;<br /> }<br /> $c = array_map("comp", $a, $b);<br /> if (count(array_intersect($c, array(True))) > 0){<br /> another code brick;<br /> }<br /> ?> <br />
不过这个要走完全部单元,可以说不符合你的题意
但你可以留着参考,在其他必须全部判断的时候还是有用的

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