Question

我正在努力填补飞机的头等舱和经济座位。然而，当头等舱或经济舱满时，我希望有一个弹出窗口，如果有任何座位，你会想要坐在另一个座位区。如果所有座位都已满，则应该有一个弹出窗口显示飞机已满。

我有以下js小提琴：http://jsfiddle.net/Godin1/ba8Eu/

和javascript：

var seatSection;
seatsAvailable = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0];


check = function(){
seatSection = parseInt(document.getElementById('number').value);

if (seatSection == 1) {
    firstClass();
} else if (seatSection == 2) {
    economy();
} else {
    other();
}
}

firstClass = function() {

for (var i = 1; i <= 5; i++) {
    if (seatsAvailable[i] == 0) {
        window.alert("been assigned to first class seat " + i);
        seatsAvailable[i] = 1;
        break;
    }
};

}

economy = function() {

for (var i = 6; i <= 10; i++) {
    if (seatsAvailable[i] == 0) {
        window.alert("been assigned to economy seat " + i);
        seatsAvailable[i] = 1;
        break;

    }

};

}


other = function() {
window.alert("Wrong number");
}

Answer 1

您可以在for循环调用seatFound之前添加一个布尔变量，并将其设置为false。然后在循环中，如果找到一个座位，则将其设置为true。然后你在for循环之后检查，如果它仍然是假的，那么你知道没有开放的座位，所以你可以检查这个人是否想要更改部分。

economy然后看起来像这样：

economy = function() {
    var seatFound = false;
    for (var i = 6; i <= 10; i++) {
        if (seatsAvailable[i] == 0) {
            window.alert("been assigned to economy seat " + i);
            seatsAvailable[i] = 1;
            seatFound = true;
            break;
        }
    };
    if (!seatFound && window.confirm("There are no more economy class seats 
                       available. Would you like an first class seat?")) {
        first();
    }
}

此外，这是您JSFiddle

的更新版本

Answer 2

您可以添加一个计算已计算座位数的计数器：

var numberOfSeatsTaken = 0;

然后更新您保留的每个座位的计数器。这是针对您的问题的更新jsfiddle。

PS。如果这是一个分配，你真的不应该要求解决你的问题 - 而是寻求帮助。

Answer 3

这应该适合你： http://jsfiddle.net/itsmikem/zYEf3/4/

var seatsAvailable = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
var searchingElsewhere = false;

function checkAvailability() {
    var sectionRequested = parseInt(document.getElementById('seatNumber').value);
    switch (sectionRequested) {
        case 1:
        case 2:
            findSeat(sectionRequested);
            break;
        default:
            alert("Wrong number!");
    }
}

function findSeat(sectionRequested) {
    var searchRange = (sectionRequested == 1) ? {
        from: 0,
        to: 4,
        section: "first class"
    } : {
        from: 5,
        to: 9,
        section: "economy"
    };
    var foundNextAvailable = false;
    for (var i = searchRange.from; i <= searchRange.to; i++) {
        if (seatsAvailable[i] == 0) {
            alert(String("You're assigned to seat " + (i + 1) + " in " + searchRange.section + "."));
            seatsAvailable[i] = 1;
            foundNextAvailable = true;
            break;
        }
    }
    if (foundNextAvailable == false) {
        if (seatsAvailable.indexOf(0) == -1) {
            alert("Sorry, the plane is full.");
            return;
        } else {
            if (confirm("Section full.  Sit elsewhere in the plane?")) {
                if (searchingElsewhere == false) searchingElsewhere = true;
                var otherSection = (sectionRequested == 1) ? 2 : 1;
                findSeat(otherSection);
            }
        }
    }
}

使用javascript数组模拟飞机座位

3 个答案: