javascript - JavaScript 中的随机对象

Question

我正在尝试编写显示随机问题的脚本。我不知道该怎么做。

这是我的不起作用(= 没有在元素上写任何内容)代码:

function theQ(quest, ans) { // question constructor
  this.question = quest;
  this.answer = ans;
}
var quest1 = new theQ("1+1", "2"); // object 1
var quest2 = new theQ("2+2", "4"); // object 2
var container = document.getElementById("rendomQuestion"); // display
var randomNumber = Math.random(); // randomize 
var numQuestion = Math.floor(randomNumber * theQ.length); // between theQ number of objects
container.innerHTML += quest+numQuestion.question; // write the chosen question.

请告诉我我在这里做错了什么..

编辑 - 这是我的 HTML:

<p id="rendomQuestion"></p>

Answer 1

您应该使用一个数组(包含两个问题):

function theQ(quest, ans) { // question constructor
  this.question = quest;
  this.answer = ans;
}
// *** Make it an array:
var quests = [new theQ("1+1", "2"),
              new theQ("2+2", "4")];
var container = document.getElementById("rendomQuestion");
var randomNumber = Math.random();
var numQuestion = Math.floor(randomNumber * theQ.length);
// *** Now use array notation:
container.textContent = quests[numQuestion].question;

<p id="rendomQuestion"></p>