这是JS：function Question(question, answers, correct) { this.question=question; this.answers=answers; this.correct=correct;}Question.prototype.displayQuestion=function () { console.log(this.question) this.answers.forEach((answer, i)=> { console.log(`${i}: ${answer}`) })}Question.prototype.checkAnswer=function(answer) { (answer==this.correct)? true: false}var q1=new Question("What day is it today?", ["Monday", "Tuesday"], 0)var q2=new Question("How are you?", ["Good", "Really good"], 1)var q3=new Question("Is it nice out?", ["Yes", "No", "In-between"], 3)var questions=[q1, q2, q3];function createGame() { var num=Math.floor(Math.random()*questions.length) questions[num].displayQuestion() var userInput=parseInt(prompt("Please enter answer")) questions[num].checkAnswer(userInput)? console.log('You won!'): createGame()}createGame()这是 index.html<!DOCTYPE html><html> <head> <meta charset="UTF-8"> <title>Section 5: Advanced JavaScript: Objects and Functions</title> </head> <body> <h1>Section 5: Advanced JavaScript: Objects and Functions</h1> <script src="script.js"></script> </body></html我对这个简单程序的目标是不断输出问题，直到用户做对为止。如果用户答对了问题，您将使用 console.log("You won!") 并且程序将停止运行。我在三元运算符的帮助下做到了这一点。但是，为什么我的程序会一直运行？
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ABOUTYOU
TA贡献1812条经验 获得超5个赞
checkAnswer总是返回 undefined 因为你没有做return任何事情：
Question.prototype.checkAnswer=function(answer) {
return answer==this.correct
}
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