JavaScript样本测试分数计算函数的问题排查与修正

Hey there! Let's get your score calculation sorted out—your current logic has the formula backwards, which is why some test cases are failing.

The Problem with Your Current Code #

Your line percent = (correct*questions); is multiplying correct answers by total questions, which gives an unrelated large number instead of a percentage. To calculate the percentage of correct answers, you need to follow the right mathematical steps:

1. Divide the number of correct answers by the total number of questions
2. Multiply that result by 100 to convert it to a percentage
3. Ensure you return an integer (since all your test cases expect whole numbers)

Corrected Code #

Here's the fixed version of your function:

function scoreTest(correct, questions) {
  var percent;
  // Only change code below this line
  percent = Math.round((correct / questions) * 100);
  // Only change code above this line
  return percent;
}

Why This Works #

Let's verify against your test cases to confirm:

• scoreTest(47,50): (47/50)*100 = 94 → returns 94 ✅
• scoreTest(16,20): (16/20)*100 = 80 → returns 80 ✅
• scoreTest(97,100): (97/100)*100 = 97 → returns 97 ✅
• scoreTest(1,50): (1/50)*100 = 2 → returns 2 ✅

We use Math.round() here to handle edge cases where division might result in a decimal (like 3 correct out of 7 questions would round to 43 instead of leaving you with 42.85...). If you're guaranteed all test cases will result in whole numbers, you could also use (correct * 100) / questions which works just as well.

内容的提问来源于stack exchange，提问作者PreYVin