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ここでちょっと困っています。変数が数値のみで定義されていることを確認しましたが、コードはまだ数値ではありません。私が間違っていることを知っている人はいますか？

以下のコード:

//declare vars and/or constants
var endString = "Total cost per night is $";
var viewCost;
var discount;

//input vars
pplCount = prompt("How many people will be staying?");
discYes = prompt("Do you have an AAA discount?");
viewYes = prompt("Do you want a room with a view?");

//if variables

if(pplCount === "1" || pplCount === "2" && discYes === "Yes" && viewYes === "Yes") {
discount = 50 * 0.15;
roomCost = 50;
roomCost = +roomCost - discount + viewCost;
viewCost = (+roomCost * 0.10);
document.write(endString + roomCost);
}else if(pplCount === "3" || pplCount === "4" && discYes === "Yes" && viewYes === "Yes") {
discount = 60 * 0.10;
roomCost = 60;
roomCost = roomCost - discount + viewCost;
viewCost = (roomCost * 0.10);
document.write(endString + roomCost);
}
else if(pplCount === "5" || pplCount === "6" && discYes === "Yes" && viewYes === "Yes") {
discount = 70 * 0.05;
roomCost = 70;
roomCost = roomCost - discount + viewCost;
viewCost = (roomCost * 0.10);
document.write(endString + roomCost);
}

else if(pplCount === "1" || pplCount === "2" && discYes === "No" && viewYes === "Yes") {
discount = 50 * 0.15;
roomCost = 50;
roomCost = roomCost + viewCost;
viewCost = (roomCost * 0.10);
document.write(endString + roomCost);
}
else if(pplCount === "3" || pplCount === "4" && discYes === "No" && viewYes === "Yes") {
discount = 60 * 0.10;
roomCost = 60;
roomCost = roomCost + viewCost;
viewCost = (roomCost * 0.10);
document.write(endString + roomCost);
}
else if(pplCount === "5" || pplCount === "6" && discYes === "No" && viewYes === "Yes") {
discount = 70 * 0.05;
roomCost = 70;
roomCost = roomCost + viewCost;
viewCost = (roomCost * 0.10);
document.write(endString + roomCost);
}

else if(pplCount === "1" || pplCount === "2" && discYes === "No" && viewYes === "No") {
discount = 50 * 0.15;
roomCost = 50;
viewCost = (roomCost * 0.10);
document.write(endString + roomCost);
}
else if(pplCount === "3" || pplCount === "4" && discYes === "No" && viewYes === "No") {
discount = 60 * 0.10;
roomCost = 60;
viewCost = (roomCost * 0.10);
document.write(endString + roomCost);
}
else if(pplCount === "5" || pplCount === "6" && discYes === "No" && viewYes === "No") {
discount = 70 * 0.05;
roomCost = 70;
viewCost = (roomCost * 0.10);
document.write(endString + roomCost);
}

else if(pplCount === "1" || pplCount === "2" && discYes === "Yes" && viewYes === "No") {
discount = 50 * 0.15;
roomCost = 50;
roomCost = roomCost - discount;
viewCost = (roomCost * 0.10);
document.write(endString + roomCost);
}
else if(pplCount === "3" || pplCount === "4" && discYes === "Yes" && viewYes === "No") {
discount = 60 * 0.10;
roomCost = 60;
roomCost = roomCost - discount;
viewCost = (roomCost * 0.10);
document.write(endString + roomCost);
}
else if(pplCount === "5" || pplCount === "6" && discYes === "Yes" && viewYes === "No") {
discount = 70 * 0.05;
roomCost = 70;
roomCost = roomCost - discount;
viewCost = (roomCost * 0.10);
document.write(endString + roomCost);
}

roomCost を2回定義しているためですか？

4

3 に答える 3

3

NaN操作によって無効な結果が得られた場合に得られるものですNumber(数値ではありません)

お気に入り：

5 - "a"
5 + NaN
parseInt("a", 10)
5 + undefined

NaNオペランドとして持つ操作も同様に返されるという意味で有毒です。悪い操作がどこにあるかを把握します。NaNNaN

あなたのコードをちらりと見ると、数値ではなく文字列を操作していることがわかります。parseInt()文字列を適切な数値に変換するために使用します。parseIntエラーが返された場合は、入力を検証してくださいNaN。

于 2013-04-17T16:16:02.513 に答える