const student = {
  name: "林晨",
  stage: "JavaScript 核心",
};

const scores = [78, 85, 92];

function getAverageScore(list) {
  let total = 0;

  for (let index = 0; index < list.length; index += 1) {
    total += list[index];
  }

  return total / list.length;
}

function getLevel(average) {
  if (average >= 85) {
    return "优秀";
  }

  if (average >= 70) {
    return "良好";
  }

  return "继续努力";
}

const average = getAverageScore(scores);
const level = getLevel(average);

console.log("姓名：", student.name);
console.log("阶段：", student.stage);
console.log("平均分：", average);
console.log("等级：", level);

if (average >= 80) {
  console.log("可以进入下一阶段");
}