多个嵌套if语句未进行计算

multiple nested if statements not calculating

本文关键字：计算 语句 嵌套 if      更新时间：2023-09-26

我正试图让这个工资单计算器运行相互嵌套的多个if语句。

它需要满足的条件如下：

例如，如果每月总工资是2000NI代码的最后一个字母是

要计算国民保险津贴，你需要将总工资除以4。2000/乘以4=500。这意味着NI频带是a2。

然后总和为"毛*a2"（如代码顶部列出的变量所示）

然后将结果显示为"您的NI扣除：？？"

如果输入了不同的字母，我很难运行if语句。。例如"B"

    <!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Untitled Document</title>
<script>
function computeNet() {
<!--NI Codes - use https://www.gov.uk/national-insurance-rates-letters/contribution-rates for updates on NI rates--!>
//NI Code A//
var a1 = 0;
var a2 = 0.12;
var a3 = 0.12;
var a4 = 0.02;
//NI Code B//
var b1 = 0;
var b2 = 0.0585;
var b3 = 0.0585;
var b4 = 0.02;
//NI Code C//
var c = 0;
var d1 = 1.4;
var d2 = 0.106;
var d3 = 0.12;
var d4 = 0.02;
//NI Code E//
var e1 = 0;
var e2 = 0.0585;
var e3 = 0.0585;
var e4 = 0.02;
//NI Code J//
var j1 = 0;
var j2 = 0.02;
var j3 = 0.02;
var j4 = 0.02;
//NI Code L//
var l1 = 1.4;
var l2 = 0.02;
var l3 = 0.02;
var l4 = 0.02;
var gross = document.getElementById('gross').value;
var tax_code = document.getElementById('tcode').value;
var ni_code = document.getElementById('ni').value;
var allowance = ((gross - ((tax_code * 10)/12)));
var ni_allowance = (gross / 4);

         if (ni_code = "A") {
             if (ni_allowance > 111 && ni_allowance < 153) {
                 ni_minus = (gross * a1);
             }
             else if (ni_allowance > 153.01 && ni_allowance < 770) {
                 ni_minus = (gross * a2);
             }
             else if (ni_allowance > 770.01 && ni_allowance < 805) {
                 ni_minus = (gross * a3);
             }
             else {
                 ni_minus = (gross * a4);
             }
        if (ni_code = "B") {
             if (ni_allowance > 111 && ni_allowance < 153) {
                 ni_minus = (gross * b1);
             }
             else if (ni_allowance > 153.01 && ni_allowance < 770) {
                 ni_minus = (gross * b2);
             }
             else if (ni_allowance > 770.01 && ni_allowance < 805) {
                 ni_minus = (gross * b3);
             }
             else {
                 ni_minus = (gross * b4);
             }
         }
         document.getElementById('ni_deduction').innerHTML = "Your NI deduction:"+ni_minus;
}
}
</script>
</head>
<body>
<p>Your Monthly Gross Pay: £<input id="gross" type="number" onChange="computeNet()"></p>
<p>The numerical part of your tax code: <input id="tcode" type="number" onChange="computeNet()"></p>
<p>last letter of your NI code: <input id="ni" type="text" onChange="computeNet()"></p>
<h2 id="gross_pay"></h2>    
<h2 id="paye-deduction"></h2>
<h2 id="ni_deduction"></h2>
<h2 id="net_pay"></h2>
</body>
</html>

此处编码：http://jsfiddle.net/n384noLk/

我期待您的帮助

If"B"需要移出If"A"。

因为它是嵌套的，所以如果ni_code不等于"A"，则完全跳过If"B"语句。

if (ni_code == "A") {
    if (ni_allowance > 111 && ni_allowance < 153) {
        ni_minus = (gross * a1);
    } else if (ni_allowance > 153.01 && ni_allowance < 770) {
        ni_minus = (gross * a2);
    } else if (ni_allowance > 770.01 && ni_allowance < 805) {
        ni_minus = (gross * a3);
    } else {
        ni_minus = (gross * a4);
    }
} elseif (ni_code == "B") {
        if (ni_allowance > 111 && ni_allowance < 153) {
            ni_minus = (gross * b1);
        } else if (ni_allowance > 153.01 && ni_allowance < 770) {
            ni_minus = (gross * b2);
        } else if (ni_allowance > 770.01 && ni_allowance < 805) {
            ni_minus = (gross * b3);
        } else {
            ni_minus = (gross * b4);
        }
}

http://jsfiddle.net/n384noLk/2/

Equality由==在JavaScript中测试，因此应该是：

if(ni_code == "A")

和

if(ni_code == "B")

此外，你没有关闭你的第一个if语句，所以它看到了

if(ni_code == "B")

作为嵌套if.的延续。您需要另一个｝after:

else {
    ni_minus = (gross * a4);
}
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