public class Hi{ public static void main(String[] args) { int[][] ns = { { 82, 90, 91 }, { 68, 72, 64 }, { 95, 91, 89 }, { 67, 52, 60 }, { 79, 81, 85 }, }; double average = 0; double sum = 0; double len = 0; for(int[] arr:ns) { len += arr.length; for(int n:arr) { sum +=n; } } average = sum/len; 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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落丨寒