Question

由于某些奇怪的原因，这行代码被识别为

此特定行

  `Unexpected identifier` 

    bmr =  66 + ( 6.23 * weightInlbs ) + ( 12.7 heightInInches ) - ( 6.8 * age );

这是整个代码

function metricComputation() {
    var age = document.getElementById("age");
    var weightInlbs = document.getElementById("weight");
    var heightInInches =  feetToInches(new Number(document.getElementById("heightinFt")) , document.getElementById("heightinIn"));
    var bmr;
    var gender = document.getElementById("gender");


    if(gender === "male"){
         bmr =  66 + ( 6.23 * weightInlbs ) + ( 12.7 heightInInches ) - ( 6.8 * age );
    }

}

这是整个标记

<!DOCTYPE>
<html>
    <head>
        <script src="bmrcalc.js"></script>
    </head>
        <body>
            <center>
                    <h1>Basal Metabolic Rate</h1>
                Height: <input type = "text" id ="heightinFt"> ft  <input type = "text" id = "heightinIn"> in <br>
                Weight: <input type = "text" id ="weight">lbs<br>
                Age: <input type = "text" id = "age"><br>
                Gender:<select id = "gender">
                    <option value = "male">Male</option>
                    <option value = "female">Female</option>
                <select> <br>
                <button onclick = "metricComputation()">Compute</button>
                <div id = "result"></div>
            </center>
        </body>
</html>

Answer 1

你的意思是成倍增加吗？

bmr =  66 + ( 6.23 * weightInlbs ) + ( 12.7 * heightInInches ) - ( 6.8 * age );
// -----------------------------------------/\

Answer 2

这是错误：

12.7 heightInInches

标识符heightInInches不应位于此位置。期望的是像*，+， - 或/

这样的运算符

Answer 3

if(gender === "male"){
     bmr =  66 + ( 6.23 * weightInlbs ) + ( 12.7 * heightInInches ) - ( 6.8 * age );
}

您忘记了( 12.7 heightInInches )

中的 *

Answer 4

在“12.7”和heightInInches“之间缺少”*“：

bmr =  66 + ( 6.23 * weightInlbs ) + ( 12.7 * heightInInches ) - ( 6.8 * age );

Javascript意外的意外标识符

4 个答案: