Javascript 到处都是计算。需要数学天才_Javascript

Javascript 到处都是计算。需要数学天才

javascript

Javascript 到处都是计算。需要数学天才,javascript,Javascript,函数计算不正确上下文：头等舱票价是经济舱票价的2倍。商务舱票价是经济舱票价的1.5倍。往返票价是单程票价的2倍单程经济舱票价的路线成本（基本成本）霍金斯-里弗代尔229美元霍金斯-哈登菲尔德259美元霍金斯-罗克韦尔199美元霍金斯-伊格尔顿179美元霍金斯-波尼179美元霍金斯-双峰239美元功能应该是添加所选选项并显示总数。怎么了 <!DOCTYPE html> <html> <head> </head&g

函数计算不正确

上下文：头等舱票价是经济舱票价的2倍。商务舱票价是经济舱票价的1.5倍。往返票价是单程票价的2倍

单程经济舱票价的路线成本（基本成本）霍金斯-里弗代尔229美元霍金斯-哈登菲尔德259美元霍金斯-罗克韦尔199美元霍金斯-伊格尔顿179美元霍金斯-波尼179美元霍金斯-双峰239美元

功能应该是添加所选选项并显示总数。怎么了

<!DOCTYPE html>
<html>
    <head>

    </head>
    <script>
        function calculation() {
            var cost = 0; //Base cost of flight (one way Economy)
            var radioButton; // A radio button
            var selection = 0; // The selected radio button, 1 to 6 going down.
            for (var i = 1; i <= 6; i++) {// Get the number of the selection (1 to 6)
                radioButton = document.getElementById("destination" + i);
                if (radioButton.checked == true) {
                    selection = i;
                }
            }
            if (selection == 1) {
                cost = 229
            } else if (selection == 2) {
                cost = 259
            } else if (selection == 3) {
                cost = 199
            } else if (selection == 4) {
                cost = 179
            } else if (selection == 5) {
                cost = 179
            } else if (selection == 6) {
                cost = 239
            } else if (selection == 0) {
                alert("Please select a flight.");
                return false;
            }
            var seating = 0;
            for (var x = 1; x <= 3; x++) {
                radioButton = document.getElementById("seating" + x);
                if (radioButton.checked == true) {
                    seating = x;
                }
            }

            var totalcost = 0;
            if(seating == 0){
                alert("Please select a seat.");
                return false;
            } else if(seating == 1){
                totalcost = cost + (cost * 2);
            } else if(seating == 2){
                totalcost = cost + (cost * 1.5);
            } else if(seating == 3){
                totalcost = cost;
            }


            if(document.getElementById("return").checked){
                totalcost = totalcost*2;
            }
            totalcost = totalcost + cost;
            alert("Total cost: "+totalcost);
        }

    </script>
    <body>
        <h1> Hawkins Airlines Fare Calculator</h1>
        <p> Complete the form below to calculate the cost of your flight.</p>

        <form onsubmit="return false;">
            <p>Route:</p>
            <input type="radio" name="destination"  id="destination1"> Hawkins - Riverdale<br>
            <input type="radio" name="destination"  id="destination2"> Hawkins - Haddonfield<br>
            <input type="radio" name="destination"  id="destination3"> Hawkins - Rockwell<br>
            <input type="radio" name="destination"  id="destination4"> Hawkins - Eagleton<br>
            <input type="radio" name="destination"  id="destination5"> Hawkins - Pawnee<br>
            <input type="radio" name="destination"  id="destination6"> Hawkins - Twin Peaks<br>
            <br>

            <input type="checkbox" name="appliances" id="return">
            <label>Click here if you will be purchasing a return fare </label><br>

            <p>Seating class:</p>
            <input type="radio" name="seating"  id="seating1"> First seating<br>
            <input type="radio" name="seating"  id="seating2"> Business seating<br>
            <input type="radio" name="seating"  id="seating3"> Economy seating<br>
            <br>

            <button onclick="calculation()"> Calculate </button>
            <input type="reset" value="Restore Defults">
        </form>

    </body>
</html>


函数计算（）{
var cost=0；//基本飞行成本（单程经济型）
var radioButton；//单选按钮
var selection=0；//所选单选按钮，1到6向下。
对于（var i=1；i，如果您有适当的后端验证：
<form onsubmit="return false;">
            <p>Route:</p>
            <input type="radio" name="destination" value="229" id="destination1"> Hawkins - Riverdale<br>
            <input type="radio" name="destination" value="259" id="destination2"> Hawkins - Haddonfield<br>
            <input type="radio" name="destination" value="199" id="destination3"> Hawkins - Rockwell<br>
            <input type="radio" name="destination" value="179" id="destination4"> Hawkins - Eagleton<br>
            <input type="radio" name="destination" value="179" id="destination5"> Hawkins - Pawnee<br>
            <input type="radio" name="destination" value="239" id="destination6"> Hawkins - Twin Peaks<br>
            <br>

            <input type="checkbox" name="appliances" id="return">
            <label>Click here if you will be purchasing a return fare </label><br>

            <p>Seating class:</p>
            <input type="radio" name="seating" value="2" id="seating1"> First seating<br>
            <input type="radio" name="seating" value="1.5" id="seating2"> Business seating<br>
            <input type="radio" name="seating" value="1" id="seating3"> Economy seating<br>
            <br>

            <button onclick="calculation()"> Calculate </button>
            <input type="reset" value="Restore Defults">
</form>

什么是radioButton，什么是Selection，因为问题详细信息中的内容不在函数本身中，请修复变量命名和问题标题，但由于某些原因，您在结尾处的总权利增加了一倍（totalcost=totalcost+cost；），因此可能会删除该选项。
function calculation() {
  //select selected radio buttons
  const selectedRoute = document.querySelector('input[name="destination"]:checked')
  const selectedSeatingClass = document.querySelector('input[name="seating"]:checked')
  const isRoundTrip = document.querySelector('input[name="appliances"]').checked

  //show "Select route" alert if no route is selected
  if (selectedRoute === null) {
    alert('Select route')

    //do not continue calculation
    return false;
  }

  //Do the same, just for seating
  if (selectedSeatingClass === null) {
    alert('Select seating class')

    //do not continue calculation
    return false;
  }

  //grab values off selected radio buttons
  //wrap them in Number to get a numeric value because
  //you always get string when reading a value off an input
  const cost = Number(selectedRoute.value)
  const seatingMultiplier = Number(selectedSeatingClass.value)

  const price = cost * seatingMultiplier

  isRoundTrip ? alert(price * 2) : alert(price)

}