需求是这样的,根据可变参数 $people 来给每个人随机分配百分比,条件是人数一定会控制在 3
写了个简单的分配,但会出现最后一个人会得到很多的情况,并且由于分配区间实际上是 1 - 平均数 之间的百分比,不是严格意义上的 “随机平均分配”,求各位大大给个思路,抛砖引玉,不甚感谢。
$people = 3; //人数 $percent = 100; //百分比 $average = floor($percent/$people); $rand_array = array(); $count = 0; for ($i=0; $i < $n; $i++) { if($i == ($n - 1)){ $rand_array[$i] = 100 - $count; }else{ $rand_array[$i] = rand(1,$average); $count = $count + $rand_array[$i]; } } return $rand_array;
这样可能好点
$people = 3; //人数$percent = 100; //百分比$res = array_fill(0, 3, floor($percent/$people)); //平均分配$d = 5; //容差foreach($res as &$v) $v += rand(-$d, $d);$res[rand(0, $people-1)] += $percent - array_sum($res); //随机将残差补入print_r($res);
忘记上来结贴了,感谢版主大大的回复,问题已经解决了,贴出来与大家分享:
public static function rand_bouns($person){ //百分比 $percent = 100; $now_person = $person; $bouns = array(); for($i=0;$i<=$person-1;$i++){ $bouns[$i] = self::get_bouns($now_person,$percent); $percent = $percent - $bouns[$i]; $now_person = $now_person - 1; $now_bouns += $bouns[$i]; } return $bouns; }public static function get_bouns($person,$percent){ if($person==1) return $percent; $max = 30; if($percent < $max) $max = $percent; $min = $percent-$max*($person-1) <= 0 ? 1 : $percent-$max*($person-1); $max = $max-($person) <= 0 ? 1 : $max-($person); return rand($min,$max); }