我已经编写了这个程序，一直找不到任何错误，但是当我输入内容时仍然没有任何输出

debugcn 发表于 Dev

褪色

这是我的代码。任何人都知道为什么没有输出吗？我没有发布语法错误，可以输入内容，但是输入后不显示任何输出或错误信息....... ................................................... ................................................... ................................................... .....

<script type="text/javascript">
<!--
var basePrice, carType, salePrice, markupLow, markupMed, markupHigh;

var fordLow = 1.02;
var fordMed = 1.03;
var fordHigh = 1.05;
var GMLow = 1.05;
var GMMed = 1.07;
var GMHigh = 1.10;
var dodgeLow = 1.01;
var dodgeMed = 1.02;
var dodgeHigh = 1.03;
var highCutoff = 20000;
var lowCutoff = 10000;
var errorFlag = 0;

basePrice = prompt("What is the base price?", "10000");
basePrice = parseInt(basePrice);
carType = prompt("Which car brand? ford, gm, dodge?", "ford");

switch(carType)
{
    case "ford":
        markupLow = fordLow;
        markupMed = fordMed;
        markupHigh = fordHigh;
    break;
    case "gm":
        markupLow = gmLow;
        markupMed = gmMed;
        markupHigh = gmHigh;
    break;
    case "dodge":
        markupLow = dodgeLow;
        markupMed = dodgeMed;
        markupHigh = dodgeHigh;
    break;
    default:
        alert("You typed " + carType + " you needed to type: ford, gm, or dodge");
        errorFlag = 1;
    break;

if (errorFlag == 0)
{    
        if (basePrice > highCutoff)
      { 
              markupRate = markupHigh;
            }       
    else if (basePrice < lowCutoff)
    {    
                markupRate = markupLow
    }
        else
                {
        markupRate = markupMed;
                }

        salePrice = basePrice * markupRate;

document.write("Base Price: $" + basePrice);
document.write("<br>Car Make" + carType);
document.write("<br>The sale price: $" + salePrice);
}
else
{
        document.write("You typed " + carType + " you needed to type: ford, gm, or dodge");
}
}
// -->
</script>

妮娜·斯科茨（Nina Scholz）

您需要提前关闭switch语句。否则，由于的break声明，其余的将不会执行default。

var basePrice, carType, salePrice, markupLow, markupMed, markupHigh;

var fordLow = 1.02;
var fordMed = 1.03;
var fordHigh = 1.05;
var GMLow = 1.05;
var GMMed = 1.07;
var GMHigh = 1.10;
var dodgeLow = 1.01;
var dodgeMed = 1.02;
var dodgeHigh = 1.03;
var highCutoff = 20000;
var lowCutoff = 10000;
var errorFlag = 0;

basePrice = prompt("What is the base price?", "10000");
basePrice = parseInt(basePrice);
carType = prompt("Which car brand? ford, gm, dodge?", "ford");

switch (carType) {
  case "ford":
    markupLow = fordLow;
    markupMed = fordMed;
    markupHigh = fordHigh;
    break;
  case "gm":
    markupLow = gmLow;
    markupMed = gmMed;
    markupHigh = gmHigh;
    break;
  case "dodge":
    markupLow = dodgeLow;
    markupMed = dodgeMed;
    markupHigh = dodgeHigh;
    break;
  default:
    alert("You typed " + carType + " you needed to type: ford, gm, or dodge");
    errorFlag = 1;
    break;
} // close switch

if (errorFlag == 0) {
  if (basePrice > highCutoff) {
    markupRate = markupHigh;
  } else if (basePrice < lowCutoff) {
    markupRate = markupLow
  } else {
    markupRate = markupMed;
  }

  salePrice = basePrice * markupRate;

  document.write("Base Price: $" + basePrice);
  document.write("<br>Car Make" + carType);
  document.write("<br>The sale price: $" + salePrice);
} else {
  document.write("You typed " + carType + " you needed to type: ford, gm, or dodge");
}

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