如何随机化actionscript3中的测验问题？

Question

我在flash中有一个问答游戏;基本上你需要输入答案来回答4个问题。最后，它会显示分数和答案与正确的答案。

1. 我需要有关如何随机化问题的帮助（不重复问题）
2. 最后，正确的答案需要与玩家回答问题的顺序相匹配。

我附上了下面的图片。



代码：第1帧

stop();
var nQNumber:Number = 0;
var aQuestions:Array = new Array();
var aCorrectAnswers:Array = new Array("Jupiter", "Mars", "war", "Titan");
var aUserAnswers:Array = new Array();
aQuestions[0] = "What is the biggest planet in our solar system?";
aQuestions[1] = "Which planet in our solar system is the 4th planet from the 
sun?";
aQuestions[2] = "Mars is named after the Roman god of ___.";
aQuestions[3] = "What is the name of Saturn's largest moon?";
questions_txt.text = aQuestions[nQNumber];
submit_btn.addEventListener(MouseEvent.CLICK, quiz);
function quiz(e:MouseEvent):void{
aUserAnswers.push(answers_txt.text);
answers_txt.text = "";
nQNumber++;
if(nQNumber < aQuestions.length){
  questions_txt.text = aQuestions[nQNumber]}
else{
  nextFrame()}
}

第2帧

var nScore:Number = 0;
for(var i:Number = 0; i < aQuestions.length; i++){
this["userAnswer" + i + "_txt"].text = aUserAnswers[i];
this["correctAnswer" + i + "_txt"].text = aCorrectAnswers[i];
if(aUserAnswers[i].toUpperCase() == aCorrectAnswers[i].toUpperCase()){
nScore++}
if(i == aQuestions.length - 1){
score_txt.text = nScore.toString()}}

Answer 1

处理此问题的常用方法是创建一个数组来保存需要提问的问题，随机化数组，然后在询问时从数组中删除相应的问题。然后，当该数组为空时，请转到回顾屏幕。

以下是您可以实现此目标的众多方法之一：

首先，让我们通过使用对象而不是一大堆数组来简化这一过程。您的对象将具有所有相关信息的属性

//create an array that will hold all your questions
var questions:Array = [];

//add a new question object to the array, repeat for all questions
questions.push({
    question: "What is the biggest planet in our solar system?",
    correctAnswer: "Jupiter"
    userAnswer: null,
    correct: false
});

接下来，让我们随机化该数组：

//sort the array with the sort function below
questions.sort(randomizeArray);

//this sorts in a random way
function randomizeArray(a,b):int {
    return(Math.random() > 0.5) ? 1: -1;
}

现在，让我们复制数组以跟踪需要提出哪些问题

var askQuestions:Array = questions.concat(); //concat with no parameters returns a new shallow copy of the array
var curQuestion; //create a var to hold the current question

现在，创建一个函数来询问下一个问题：

function askNextQuestion():void {
    //check if there are any more questions to ask
    if(askQuestions.length > 0){

        //get the next question object
        curQuestion = askQuestions.shift(); //shift removes the first item of an array, and returns that item
        questions_txt.text = curQuestion.question;
        answers_txt.text = "";

    }else{
        //all questions have been asked, show your recap screen
        finish();
    }
}

单击答案按钮时，您需要运行一个功能：

function submitAnswer(e:Event = null):void {
    //if there is a current question
    if(curQuestion){
        curQuestion.userAnswer = answers_txt.text;
        curQuestion.correct = curQuestion.correctAnswer.toUpperCase() == answers_txt.text.toUpperCase();
    }

    //ask the next question
    askNextQuestion();
}

当问到所有问题时运行的函数：

function finish():void {
    var score:int = 0;

    //go through the array and count how many are correct and recap
    for(var i:int=0; i<questions.length;i++){
        if(questions[i].correct) score++;
        trace("Question " + (i+1) + ":",questions[i].question); //arrays are 0 based, so we add 1 to the index (i) so that it says "Question 1:" for the first question instead of "Question 0:"
        trace("You answered:",questions[i].userAnswer);
        trace("Correct Answer:", questions[i].correctAnswer);
        trace(questions[i].correct ? "You were correct" : "You were wrong","\n"); //this is shorthand if statement,  \n is a line break
    }

    score_txt.text = score + " out of " + questions.length;
}

当然，要做好准备，你只需：askNextQuestion()

Answer 2

您是否正在寻找名为Math.random()的漂亮功能？将Math.random（）的结果乘以所需的随机生成范围，将其四舍五入，然后使用数字在数组中选择一个随机问题。