public class Example {    public static void main(String[] args){        int[][] scores = {                { 82, 90, 91 },                { 68, 72, 64 },                { 95, 91, 89 },                { 67, 52, 60 },                { 79, 81, 85 },        };        // TODO:        double average = 0;        for(int i=0;i<scores.length;i++){          int [] n=scores[i];          for(int j=0;j<n.length;j++){              average+= (double) n[j] /(n.length*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");        }    }    }