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继续坚持

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灵光大侠

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package com.itranswarp.learnjava;


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 }, //

		};

		double average = 0;

		double sum_avg = 0;

		for(int[] score:scores) {

			int sum = 0;

			for(int s:score) {

				sum += s;

			}

			double avg = (double)sum/score.length;//计算一个学生的平均成绩

			sum_avg += avg;

		}

		average = sum_avg/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");

		}

	}

}

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