/**

 * 二维数组

 */

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 average0 = 0.0;

for (int[] arr : scores) {

int sum = 0;

for (int a : arr) {

sum += a;

}

average0 += sum/(float)arr.length;

}

double average = average0/scores.length;

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");

}

}