Question

出于教育的原因，我正在研究一种简单的算法，该算法随机生成两个数字，然后要求将生成的数字相加，告诉您响应中是对还是错，并跟踪结果（不超过100个）。包含报告如下内容的函数：“您已经正确设置了80/100”但是我认为语法不适用。我无法获得分数变量来计算正确答案。

这是我的代码。

do{

var firstnum = Math.floor(Math.random()*10);
var secondnum = Math.floor(Math.random()*10);
var result = firstnum+secondnum;
var score=0;


var answer = prompt("what is "+firstnum + "+" + secondnum);

if(answer < result || answer > result){alert("Wrong! " + "The correct answer 
is " + result)};

if(answer == result){alert("you are correct!"), score++};


alert("Awesome, You have gotten " + score + " correct so far!!!");}
while(score<100);

让我克服困难。我希望，如果我能通过这个小家伙，我真的可以把更多的概念弄清楚。

Answer 1

您将每个循环中的score重置为零。将声明和初始化移到顶部。

一些提示：

在block statement { /* code */ }之后不需要分号，
使用unary plus +将strinn转换为数字
将单个if statement与else块一起用于支票的对面。

// declare all variables at top
var firstnum,
    secondnum,
    result,
    score = 0,
    answer;

do {
    firstnum = Math.floor(Math.random() * 10);
    secondnum = Math.floor(Math.random() * 10);
    result = firstnum + secondnum;
    // covert input string to number with unary plus
    answer = +prompt("what is " + firstnum + "+" + secondnum);
    //       ^

    // just check the result and omit a second if clause,
    // because it is just the opposite check
    // take the more easy/shorter check first
    if (answer === result ) {
        alert("you are correct!");
        score++;
    } else {
        alert("Wrong! " + "The correct answer is " + result)
    }
    alert("Awesome, You have gotten " + score + " correct so far!!!");
} while (score < 2) // take a small number for scoring check

如何将迭代结果存储在变量中

1 个答案: