多选题评分规则
每个正确选项都有得分权重,选正确一个给该正确选项得分权重的分值,选错一个,则总分为0
假如:正确答案ABC ,总分10分,权重分别为 20% 40% 40%
提交答案 ABC 得 (20%+40%+40%)* 10 = 10分
提交答案 AB 得 (20%+40%)* 10 = 6分
提交答案 ABD 得 0分
集思广益,如果可以请使用PHP作答
每个正确选项都有得分权重,选正确一个给该正确选项得分权重的分值,选错一个,则总分为0
假如:正确答案ABC ,总分10分,权重分别为 20% 40% 40%
提交答案 ABC 得 (20%+40%+40%)* 10 = 10分
提交答案 AB 得 (20%+40%)* 10 = 6分
提交答案 ABD 得 0分
集思广益,如果可以请使用PHP作答
不会php, 用一下js
// 选择的选项
const select = ['a','b','d']
// 分数
const score = {
'a': 20,
'b': 20,
'c': 60,
'd': 0
}
// 根据所选 得到 分数如:abd 的到 20,20,0
const a = select.map(x => score[x])
// 如果 a里面有 0 直接返回 0 否则 reduce 后得到 分数
total = a.includes(0) ? 0 : a.reduce((total, i) => total+ (i *0.1) , 0)
假设你的答案有一些分隔符例如,
,你有每道题的标准答案,可以如下:
/**
*@param $standard array 标准答案
*@param $answer string 提交答案
*/
function get_score($standard,$answer){
//分数
$score = 0;
$answer = explode(',', $answer);
if(!empty($answer)){
foreach ($answer as $v) {
if(isset($standard[$v])){
$score+=(int)($standard[$v]*10);
}else{
$score = 0;
break;
}
}
}
return $score;
}
var_dump(get_score([
'A' => 0.2,
'B' => 0.4,
'C' => 0.4
],'A,B'));
function score(customAnswer, totalScore, weight) {
let ret = 0
for (let a of customAnswer) {
if (!weight[a]) {
return 0
} else {
ret += totalScore * weight[a]
}
}
return ret
}
score('abc', 10, {a: 0.2, b: 0.4, c: 0.4})
思路,获得提交与答案的交集,如果交集个数不等于提交个数,则认为,存在选错的值,如果交集个数等于提交个数,遍历求分即可
<?php
function multiSelectScore($answer, $wight, $allScore, $submit)
{
$score = 0;
$answerWight = array_combine($answer, $wight);
// 计算交集
$selects = array_intersect($answer, $submit);
if(count($selects) === count($submit)) {
// 遍历交集
foreach($selects as $key => $select) {
$score += $answerWight[$select] * 0.01 * $allScore;
}
}
return $score;
}
// 答案
$answer = ["A", "B", "C"];
// 权重
$wight = ["20","30","50"];
// 总分
$allScore = 10;
// 提交的选项
$submit = ["A","C"];
$score = multiSelectScore($answer, $wight, $allScore, $submit);
echo json_encode($score) . "\n";
function calc($result,$answer,$score){
$count = count($result);
$d = array_diff($answer,$result);
if($d){
return 0;
}
$c = array_diff($result,$answer);
$lost = count($c);
if(!$lost){
return $score;
}
switch ($count) {
case 1:
$per = [1=>1];
break;
case 2:
$per = [1=>0.4,2=>1];
break;
case 3:
$per = [1=>0.2,2=>0.6,3=>1];
break;
default:
$per = [1=>0.1,2=>0.5,3=>0.8,4=>1];
break;
}
$true = $count - $lost ;
return $per[$true]*$score;
}
$result = ['A','B','C'];
$answer = ['A','B'];
$score = 10;
echo calc($result,$answer,$score);
PHP面向对象版
/**
* Created by: Singee77
*/
class Standard
{
//答对全部题所得总分
private $totalScore = 0;
//标准答案
private $standard = [];
//提交答案
private $answer = [];
//所得总分
private $getScore = 0;
public function __construct($totalScore)
{
$this->setTotalScore($totalScore);
}
/**
* @return int
*/
public function getTotalScore()
{
return $this->totalScore;
}
/**
* @param int $totalScore
*/
public function setTotalScore($totalScore)
{
$this->totalScore = $totalScore;
}
/**
* @param array $standard
*/
public function setStandard($standard)
{
$this->standard = $standard;
}
/**
* @return array
*/
public function getStandard()
{
return $this->standard;
}
/**
* @param $answer
*/
public function checkStandard()
{
foreach ($this->answer as $each) {
if (!$weight = $this->checkAnswer($each)) {
//选错一个总分为0
$this->setGetScore(0);
break;
}
//答对一个就追加分数
$this->appendGetScore($this->getTotalScore() * $weight);
}
}
/**
* @param array $answer
*/
public function setAnswer($answer)
{
$this->answer = $answer;
}
/**
* @return array
*/
public function getAnswer()
{
return $this->answer;
}
/**
* @param $each
* return $weight
*/
private function checkAnswer($each)
{
return array_key_exists($each, $this->standard) ? $this->standard[$each] : 0;
}
/**
* @param int $getScore
*/
public function setGetScore($score)
{
$this->getScore = $score;
}
/**
* @return int
*/
public function getGetScore()
{
return $this->getScore;
}
/**
* @param int $totalScore
*/
public function appendGetScore($appendScore)
{
$this->getScore += $appendScore;
}
}
//实例一个CHECK对象并设置总分
$std = new Standard(10);
//设置标准答案以及占比
$std->setStandard(['A' => 0.2, 'B' => 0.4, 'C' => 0.4]);
//设置答案
$std->setAnswer(['A', 'B']);
//计算分数
$std->checkStandard();
//获取所得总分
$totalScore = $std->getTotalScore();
echo $totalScore;
function check_score(array $answer, array $correct, $total_score){
$answer=array_flip($answer);
$check=array_intersect_key($correct, $answer);
return in_array($check, 0) ? 0 : array_sum($ckeck)*$total_score;
}
$answer
为答案数组(['A', 'B', 'C']
)
$correct
为正确答案数组(['A'=>0.2, 'B'=>0.4, 'C'=>0.4, 'D'=>0]
)
$total_score
为总分
首先翻转$answer
让选项成为key(['A'=>0, 'B'=>1, 'C'=>2]
)
然后根据key计算$correct
和$answer
的交集$check
,$check
的key和value都保留$correct
的。
检查$check
的value中是否有0
,有的话说明有错误答案,返回0分,否则计算$check
的value的和,并乘以总分返回。
2 回答1.5k 阅读✓ 已解决
1 回答1.3k 阅读✓ 已解决
2 回答925 阅读✓ 已解决
1 回答1.1k 阅读✓ 已解决
2 回答990 阅读
1 回答960 阅读
1 回答882 阅读
js走一波,考虑到你其他选择题也适用