如何让循环在此 JavaScript 作业中工作？

Question

我有一个作业要求以下内容： “本田-丰田汽车保险：

编写一个 JavaScript 程序，根据以下规则打印车辆保险费：

 全轮驱动的本田售价 450 美元。

 两轮驱动的本田售价 350 美元。

 全轮驱动的丰田售价 300 美元。

 两轮驱动的丰田售价 250 美元。

任何其他类型的车辆都会生成错误消息。该网页应提示用户提供适当的信息：询问汽车型号（本田或丰田），然后询问是否是全轮驱动，然后显示保险费。打印保险费后，程序应询问用户是否 he/she 想要使用重复结构“

为另一辆车投保

我以前没有任何使用循环的经验，并且无法弄清楚一旦用户在提示“你想为另一辆车投保吗？”时回答“是”，如何让程序循环回到开头。 “这是我使用的代码：

function feeCalc() //Linked to button on html page. Perhaps this was the issue?
{
    let carType = prompt('Do you have a Honda or Toyota?');


    //changes case of input string to lowercase
    let carTypeLC = carType.toLowerCase();


    //prices of different insurance
    let hondaAWD = "450.00";

    let honda2WD = "350.00";

    let toyotaAWD = "300.00";

    let toyota2WD = "250.00";


    if ((carTypeLC == 'honda') || (carTypeLC == 'toyota')) {
        let wheelDrive = prompt('Does your vehicle have All Wheel Drive or Two Wheel Drive? Enter \"AWD\" or \"2WD\".');


        //changes case of input string to lowercase
        let wheelDriveLC = wheelDrive.toLowerCase();


        if ((carTypeLC == 'honda') && (wheelDriveLC == 'awd')) {
            alert('The insurance fee for your Honda AWD is $' + hondaAWD);

            document.getElementById("webDisplay").innerHTML = 'The insurance fee for your Honda AWD is $' + hondaAWD;
        } else if ((carTypeLC == 'honda') && (wheelDriveLC == '2wd')) {
            alert('The insurance fee for your Honda 2WD is $' + honda2WD);

            document.getElementById("webDisplay").innerHTML = 'The insurance fee for your Honda 2WD is $' + honda2WD;
        } else if ((carType = 'toyota') && (wheelDrive == 'awd')) {
            alert('The insurance fee for your Toyota AWD is $' + toyotaAWD);

            document.getElementById("webDisplay").innerHTML = 'The insurance fee for your Toyota AWD is $' + toyotaAWD;
        } else if ((carType = 'toyota') && (wheelDrive == '2wd')) {
            alert('The insurance fee for your Toyota 2WD is $' + toyota2WD);

            document.getElementById("webDisplay").innerHTML = 'The insurance fee for your Toyota 2WD is $' + toyota2WD;
        } else {
            alert('There seems to be an error. Please try again.');
        }
    } else {
        alert('There seems to be an error. Please try again.');
    }

    let restart = prompt('Do you want to insure another vehicle? \"y\" or \"n\"')
}

do {
    feeCalc
} while (restart = 'y' && restart != 'n');
//I commented the above do while loop code out because it was not working and made the rest of my code not function. I had to submit the assignment so I submitted what was working.

该功能链接到 html 页面上的一个按钮，也许这是我的问题，但我没有时间在截止日期前编辑我刚刚构建的所有代码。我很确定我需要使用 do while 循环，但我就是无法让它工作（因此我将其注释掉）。我是初学者，正在上网类，所以我会尽我所能地利用提供给我的信息，但不幸的是，教授没有 post 任何关于如何使用数值。除了循环部分，上面的代码工作正常。请帮忙，因为我的教授评分很慢，而且没有提供具体的反馈。

Answer 1

你已经得到了大部分。尝试 return 提示的值，然后将其用作 while 循环中的标志。像这样-

function feeCalc()  //Linked to button on html page. Perhaps this was the issue?    
  {
  
  let carType = prompt('Do you have a Honda or Toyota?');

  //changes case of input string to lowercase
  let carTypeLC = carType.toLowerCase();
    //prices of different insurance
  let hondaAWD = "450.00";
  let honda2WD = "350.00";
  let toyotaAWD = "300.00";
  let toyota2WD = "250.00";

  if ((carTypeLC == 'honda') || (carTypeLC == 'toyota'))
    {
        let wheelDrive = prompt('Does your vehicle have All Wheel Drive or Two Wheel Drive? Enter \"AWD\" or \"2WD\".');
        //changes case of input string to lowercase
        let wheelDriveLC = wheelDrive.toLowerCase();
        
        if ((carTypeLC =='honda') && (wheelDriveLC =='awd'))
            {
            alert('The insurance fee for your Honda AWD is $' + hondaAWD);
            document.getElementById("webDisplay").innerHTML = 'The insurance fee for your Honda AWD is $' + hondaAWD;
            }
        else if ((carTypeLC == 'honda') && (wheelDriveLC =='2wd'))
            {
            alert('The insurance fee for your Honda 2WD is $' + honda2WD);
            document.getElementById("webDisplay").innerHTML = 'The insurance fee for your Honda 2WD is $' + honda2WD;
            }
        else if ((carType=='toyota') && (wheelDrive=='awd'))
            {
            alert('The insurance fee for your Toyota AWD is $' + toyotaAWD);
            document.getElementById("webDisplay").innerHTML = 'The insurance fee for your Toyota AWD is $' + toyotaAWD;
            }
        else if ((carType=='toyota') && (wheelDrive=='2wd'))
            {
            alert('The insurance fee for your Toyota 2WD is $' + toyota2WD);
            document.getElementById("webDisplay").innerHTML = 'The insurance fee for your Toyota 2WD is $' + toyota2WD;
            }
        else
            {
            alert('There seems to be an error. Please try again.');
            }
    }
    else {
        alert('There seems to be an error. Please try again.');
    }
    return prompt('Do you want to insure another vehicle? \"y\" or \"n\"')
  }

// use the variable restart as a flag to break off the do...while loop
let restart = 'y';
do 
  {
    restart = feeCalc();
  } 
while (restart === 'y');

如何让循环在此 JavaScript 作业中工作？

How do I get a loop to work in this JavaScript assignment?

javascript

loops

function

do-while