/** * @author cjv * 练习多维数组 */public class AverageScore { 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; // 平均值 double sum = 0; // 成绩和 int amount = 0; // 学生数量 for (int[] arr: scores) { amount += arr.length; for (int n: arr) { sum += n; } } average = sum / amount; 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"); } }}
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