双层for循环

// 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:int he = 0;int i = 0;for (int[] arr : scores) {    for (int n : arr) {        he+=n;        i++;    }    System.out.println();}double average = (double) he /i;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");}