[英]I still get NaN even after converting calculations using parseInt
我需要打印从“总值”输入框（第3个框）内的选项获得的计算结果，但我收到的是NaN而不是计算结果。
答案应返回基于以下函数的工资总额计算。
如果工作小时数小于等于40，则计算将在if条件内进行，否则，将进行其他计算。
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()">
您正在将输入分配给未初始化的变量，将其更改为此
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>
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