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PHP中计算百分比时怎么保证各部和为1

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2017-03-24 14:50:063229browse

      PHP中计算百分比时如何保证各部和为1?

本帖最后由 Jasmine_xiaocao 于 2013-05-18 09:51:53 编辑

$total = $a+$b+$c+$d;

$percentA = ceil($a*100.0/$total);
$percentB = ceil($b*100.0/$total);
$percentC = ceil($c*100.0/$total);
$percentD = ceil($d*100.0/$total);

上面的代码似乎无法确保最后的总和是100%

$percentD = 100-$percentA-$percentB-$percentC;

除了这种方法,有其他方法吗?                     

------解决方案--------------------

$a = array(1,2,3,3);
$total = array_sum($a);
array_walk($a, function(&$item, $key, $prefix) { $item = round($item*100/$prefix); }, $total);
if($d = (100 - array_sum($a))) $a[rand(0, count($a)-1)] += $d;
print_r($a);

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