java - 如何从数组值中获取百分比

Question

我正在尝试从 for 循环中的数组值获取百分比。

  System.out.println(playerName[i+1] + " got " + playerScore[i] + " questions right out of " + question.length + "!\n");
  double playerScorePercentage = (playerScore[i] / question.length) * 100;
  System.out.println("Which is " + playerScorePercentage + "%!");

我做错了什么？ playerScore 显示一个值，但当我尝试用它进行下面的计算时，无论如何它都显示 0.0。

运行示例:

John got 3 questions right out of 10!
Which is 0.0%!

Answer 1

尝试在除法之前转换值:

double playerScorePercentage = ((double)playerScore[i] / (double)question.length) * 100;

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