// 平均成绩的总和
double averageSum = 0;
for (int[] arr : scores) {
double sum = 0;
for (int score : arr) {
sum += score;
}
double stuAverage = sum / arr.length;
System.out.println(stuAverage);
averageSum = averageSum + stuAverage;
}
average = averageSum / scores.length;