Question

我需要打印从总输入框（第3个框）中的选项中获得的计算，但是我没有计算，而是接收NaN。

答案应根据以下功能返回总薪酬计算。

如果工作小时数小于等于40，则计算将在if条件内，否则，计算结果不同。

function myFunction() {
  var hoursWorked;
  var hourlyRate;
  document.getElementById("hours").value = hoursWorked;
  document.getElementById("payrate").value = hourlyRate;
  if (hoursWorked <= 40) {
    var grossPay = parseInt((hoursWorked * hourlyRate)).toFixed(2);
    document.getElementById("gross").value = grossPay;
  } else {
    var grossPay = parseInt((40 * hourlyRate + 1.5 * hourlyRate * (hoursWorked - 40))).toFixed(2);
    document.getElementById("gross").value = grossPay;
  }

}

# Add A H1 Heading Of "Gross Pay Calculation"

<form>
  Hourly Rate:
  <select id="payrate" align="right">
    <script>
      for(var d=10;d<=60;d++) {
        document.write("<option>"+(d)+"</option>");
        d+=9;            
        document.getElementById("payrate").value;
      }
    </script>
  </select><br> Hours Worked:
  <select id="hours" align="right">
    <script>
      for(var d=10;d<=60;d++) {
        document.write("<option>"+d+"</option>");
        d+=4;
        document.getElementById("hours").value;
      }
    </script>
  </select><br>
</form>

Gross Pay: <input type="text" id="gross" align="right"><br><br>
<input type="submit" value="GrossPay" onclick="myFunction()">

Answer 1

您将输入分配给未初始化的变量，将其更改为

hoursWorked=document.getElementById("hours").value;
hourlyRate=document.getElementById("payrate").value;

<!DOCTYPE html>
    <html>
    <head>
    <title>Page Title</title>

    <script>
     function myFunction()
     {
         var hoursWorked;
         var hourlyRate;
      //hoursWorked= 
      hoursWorked=document.getElementById("hours").value;
        hourlyRate=document.getElementById("payrate").value;
        if (hoursWorked <=40)
        {
           var grossPay=parseInt((hoursWorked*hourlyRate)).toFixed(2);
           document.getElementById("gross").value = grossPay;
        }
        else
        {
           var grossPay=parseInt((40*hourlyRate+1.5*hourlyRate*(hoursWorked-40))).toFixed(2);
           document.getElementById("gross").value = grossPay;
        }

     }
     </script>
    </head>
    <body>
     # Add A H1 Heading Of "Gross Pay Calculation"

    <form>
    Hourly Rate:  <select id="payrate" align="right">
                  <script>
                  for(var d=10;d<=60;d++)
                  {
                    document.write("<option>"+(d)+"</option>");
                    d+=9;

        document.getElementById("payrate").value;
                  }
                  </script>
                  </select><br>
     Hours Worked: <select id="hours" align="right">
                  <script>
                  for(var d=10;d<=60;d++)
                  {
                    document.write("<option>"+d+"</option>");
                    d+=4;
                    document.getElementById("hours").value;
                  }
                  </script>
                  </select><br>
     </form>    


    Gross Pay:  <input type="text" id="gross" align="right"><br><br>
    <input type="submit" value="GrossPay" onclick="myFunction()">


     </body>
     </html>

在使用parseInt

1 个答案: