public class Main {
public static void main(String[] args) {
// 用二维数组表示的学生成绩:
int[][] scores = {
{ 82, 90, 91 },
{ 68, 72, 64 },
{ 95, 91, 89 },
{ 67, 52, 60 },
{ 79, 81, 85 },
};
// TODO:
double average = 0;
double sum = 0;
int n = 0;
for (int i = 0;i <scores.length;i++){
for (int j = 0 ;j <scores[0].length;j++){
sum +=scores[i][j];
n +=1;
}
}
average =sum/n;
System.out.println(average);

if (Math.abs(average - 77.733333) < 0.000001) {
System.out.println("测试成功");
} else {
System.out.println("测试失败");
}
}
}