求帮忙一下子.

WBOY
Release: 2016-06-13 12:04:31
Original
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求帮忙一下......
下面这个表是从数据库拿出来的.应该还可以拿到更多.
id          a                    b
0           10                 2
1           30                 5
2           50                 4

要求从a里拿最高的数,然后用这个数加上b其他的数
例如:   50+2+5=57

如果只用一个array应该怎样做?
或者有更好的解法吗?
(那些数字好象全是string来的)
------解决方案--------------------
直接在数据库里面查出来就可以了

<br />select max(concat(a,'-', b)) as a,sum(b) as b  from test<br />
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结果:
a b
50-4 11
50-4+11=57
------解决方案--------------------
$a = array(10, 30, 50);<br />$b = array(2, 5, 4);<br />$max = max($a);<br />$sum = 0;<br />foreach($a as $i=>$v)<br />  if($v < $max) $sum += $b[$i];<br />echo $max + $sum;
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------解决方案--------------------
<br />$arr = array(<br />	array(10, 2),<br />	array(30, 5),<br />	array(50, 4)<br />);<br /><br />$index = 0;<br />$max = 0;<br />for($i=0,$len=count($arr); $i<$len; $i++){<br />	if($arr[$i][0]>$max){<br />		$max = $arr[$i][0];<br />		$index = $i;<br />	}<br />}<br /><br />$total = $max;<br />for($i=0,$len=count($arr); $i<$len; $i++){<br />	if($i==$index){<br />		continue;<br />	}<br />	$total += $arr[$i][1];<br />}<br /><br />echo $total; // 57<br />
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