![JS数组[2, 5, 2, 5, 10, 12],如何循环打印 （2, 5, 10, 12） 不要打印重复的值，这个循环怎么写。](/aiimages/JS%E6%95%B0%E7%BB%84%5B2%2C+5%2C+2%2C+5%2C+10%2C+12%5D%2C%E5%A6%82%E4%BD%95%E5%BE%AA%E7%8E%AF%E6%89%93%E5%8D%B0+%EF%BC%882%2C+5%2C+10%2C+12%EF%BC%89+%E4%B8%8D%E8%A6%81%E6%89%93%E5%8D%B0%E9%87%8D%E5%A4%8D%E7%9A%84%E5%80%BC%EF%BC%8C%E8%BF%99%E4%B8%AA%E5%BE%AA%E7%8E%AF%E6%80%8E%E4%B9%88%E5%86%99%E3%80%82.png)
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<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<style>
.div_bor{
border:1px solid #274b8b
padding: 5px 5px 10px 5px
}
</style>
</head>
<body>
<div class="div_bor">
<p>这是题目</p>
<p><input type="checkbox" value="A">A.选项1</p>
<p><input type="checkbox" value="B">B.选项2</p>
<p><input type="checkbox" value="C">C.选项3</p>
<p><input type="checkbox" value="D">D.选项4</p>
<p><input type="checkbox" value="E">E.选项5</p>
<p><button style="float: right" onclick="fn()">确定</button></p>
</div>
<script>
var rule = ['A','C','D']//答案
var boxs = document.getElementsByTagName('input')
var check = []
var score = 0
function fn(){
check=[]
score = 0
for(var i=0i<boxs.lengthi++){
if(boxs[i].checked){
check.push(boxs[i].value)
}
}
for(var j=0j<check.lengthj++){
if(rule.indexOf(check[j]) !=-1){
score++
}else{
score--
}
}
alert(Math.ceil(100/rule.length*score)+'分')// 分数规则,自己定吧
}
</script>
</body>
</html>
<!doctype html><html lang="en">
<head>
<meta charset="UTF-8">
<style>
.div_bor{
border:1px solid #274b8b
padding: 5px 5px 10px 5px
}
</style>
</head>
<body>
<div class="div_bor">
<p>这是题目</p>
<p><input type="checkbox" value="A">A.选项1</p>
<p><input type="checkbox" value="B">B.选项2</p>
<p><input type="checkbox" value="C">C.选项3</p>
<p><input type="checkbox" value="D">D.选项4</p>
<p><input type="checkbox" value="E">E.选项5</p>
<p><button style="float: right" onclick="fn()">确定</button></p>
</div>
<script>
var rule = ['A','C','D']//答案
var boxs = document.getElementsByTagName('input')
var check = []
var score = 0
function fn(){
check=[]
score = 0
for(var i=0i<boxs.lengthi++){
if(boxs[i].checked){
check.push(boxs[i].value)
}
}
for(var j=0j<check.lengthj++){
if(rule.indexOf(check[j]) !=-1){
score++
}else{
score--
}
}
alert(Math.ceil(100/rule.length*score)+'分')// 分数规则,自己定吧
}
</script>
</body>
</html>
