[英]Javascript using for loops with array lists
我需要制作一個看起來像這樣的網頁
(產生問題)...這是一個按鈕
? x 1 =()
? x 2 =()
...
? x 9 =()
(檢查答案)...這也是一個按鈕
當按下按鈕時(生成問題),首先提示用戶選擇一個數字。假設他們選擇了2。因此上面的列表將執行以下操作。
2 x 1 =()
2 x 2 =()
...
2 x 9 =()
然后,用戶仔細檢查並填充空白處,如下所示:
2 x 1 =(2)
2 x 2 =(7)
...
2 x 9 =(18)
然后,他們按下(檢查答案按鈕),它應該顯示以下內容。
2 x 1 =(2)正確
2 x 2 =(7)錯誤
...
2 x 9 =(18)正確
這是java腳本
var number;
function chickenWing()
{
number = prompt("Enter number for multiplication");
var changeNumber = document.getElementsByClassName("chooseNumber");
for(var i = 0; i < changeNumber.length; i++)
{
changeNumber[i].innerHTML = number;
}
}
function chickenDrumStick()
{
var array = document.getElementsByClassName("apple")
for(var i = 0; i < array.length; i++)
{
var cheese = 0;
cheese = cheese + 1;
}
var correctAnswer = cheese + number;
var array1 = document.getElementsByClassName("inPut");
for(var i = 0; i < array1.length; i++)
{
var userAnswer = Number(array1.value);
}
var array2 = document.getElementsByClassName("result")
for(var i = 0; i < array2.length; i++)
{
if(userAnswer == correctAnswer)
{
array2[i].innerHTML = "Correct!";
}
else
{
array2[i].innerHTML = "Incorrect, please try again.";
}
}
}
這就是HTML(這僅用於前兩個“數學問題”,只是為了使問題簡單起見。
<button onClick="chickenWing()">Generate question</button>
<br/>
<br/>
<span class = "chooseNumber">?</span>
<span class = "apple"> x 1 = </span>
<input type = "text" size = "6px" class = "inPut "/>
<span class = "result"></span>
<br/>
<br/>
<span class = "chooseNumber">?</span>
<span class = "apple"> x 2 = </span>
<input type = "text" size = "6px" class = "inPut"/>
<span class = "result"></span>
<br/>
<br/>
<button onClick="chickenDrumStick()">Check answer</button>
我不確定為什么這不起作用!
修改了一下代碼。 通過刪除不必要的迭代來簡化它。 希望這可以幫助。
var number; function chickenWing() { number = prompt("Enter number for multiplication"); var changeNumber = document.getElementsByClassName("chooseNumber"); for(var i = 0; i < changeNumber.length; i++) { changeNumber[i].innerHTML = number; } } function chickenDrumStick() { var array = document.getElementsByClassName("apple") var array1 = document.getElementsByClassName("inPut"); var array2 = document.getElementsByClassName("result") for(var i = 0; i < array.length; i++) { if(Number(array1[i].value) == ((i+1) * number)) { array2[i].innerHTML = "Correct!"; array2[i].classList.add('correct'); array2[i].classList.remove('incorrect'); } else { array2[i].innerHTML = "Incorrect, please try again."; array2[i].classList.add('incorrect'); array2[i].classList.remove('correct'); } } }
.correct { color:green; } .incorrect { color:red; }
<button onClick="chickenWing()">Generate question</button> <br/> <br/> <span class = "chooseNumber">?</span> <span class = "apple"> x 1 = </span> <input type = "text" size = "6px" class = "inPut "/> <span class = "result"></span> <br/> <br/> <span class = "chooseNumber">?</span> <span class = "apple"> x 2 = </span> <input type = "text" size = "6px" class = "inPut"/> <span class = "result"></span> <br/> <br/> <button onClick="chickenDrumStick()">Check answer</button>
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.