function getAverage(score1, score2, score3) {
  return (score1 + score2 + score3) / 3;
}

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

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

  return "继续努力";
}

const average = getAverage(88, 92, 79);
const level = getLevel(average);

console.log("平均分：", average);
console.log("等级：", level);