Javascript局部變量與全局變量
[英]Javascript Local vs Global Variables
問題描述
我正在嘗試學習Javascript，正在提出一個簡單的數學問題，並試圖創建一個對正確答案和錯誤答案進行評分的函數，但是我不知道如何從函數中傳遞任何信息來永久保持評分。 誰能幫我？
<html> <body> <p id="question"></p> <input id="answerBox" type=number> <button onclick="checkAnswer()">Answer</button> <p id="answer"></p> <p id="score"></p> <p id="newQuestion"></p> <script> //create MathAddition Problem; var mathAdd = function(x, y) { return x + " + " + y + " = " } //set random numbers; var x = Math.floor((Math.random()*10)+1); var y = Math.floor((Math.random()*10)+1); var z = x + y console.log(z) //Call mathAdd function; document.getElementById("question").innerHTML=mathAdd(x, y); //Check Answer var checkAnswer = function() { var answer=document.getElementById("answerBox").value; if(answer == z) { document.getElementById("answer").innerHTML=answer + " is correct"; document.getElementById("score").innerHTML="Your score is improving" ; } else { document.getElementById("answer").innerHTML=answer + " is not correct"; document.getElementById("score").innerHTML="Your score is dropping. Work harder!" ; } document.getElementById("newQuestion").innerHTML="<a href='test7.html'>Next Question</a>" } </script> </body> </html>
1 個解決方案
解決方案1
0 2016-07-09 15:26:00
只需添加一個可變score ，每當答案正確時， score就會增加。 像這樣：
var score = 0;
//Check Answer
var checkAnswer = function() {
var answer = document.getElementById("answerBox").value;
if (answer == z) {
score++;
document.getElementById("answer").innerHTML = answer + " is correct";
document.getElementById("score").innerHTML = "Your score increased to " + score;
}
else {
score--;
document.getElementById("answer").innerHTML = answer + " is not correct";
document.getElementById("score").innerHTML = "Your score dropped to " + score + ". Work harder!" ;
}
document.getElementById("newQuestion").innerHTML = "<a href='test7.html'>Next Question</a>"
}
JavaScript 中的局部變量和全局變量
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