鄭景鴻1.java

//https://www.facebook.com/groups/1403852566495675/permalink/2144687259078865/
package com.sample;

import java.util.Arrays;
import java.util.Scanner;

public class MainClass {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("請輸入班級數：");
        int classNumber = scanner.nextInt();
        int[] classroom = new int[classNumber];
        String[][] classroom2 = new String[classNumber][];
        for (int i = 0; i < classNumber; i++) {
            System.out.printf("請輸入%d班有幾人：", (i + 1));
            int studentNumber = scanner.nextInt();
            classroom[i] = studentNumber;
            for (int j = 0; j < classNumber; j++) {
                for (int k = 0; k < studentNumber; k++) {
                    classroom2[k] = new String[]{"請輸入" + (j + 1) + "班第" + (k + 1) + "人幾分："};
                    System.out.println(Arrays.toString(classroom2[k]));
                    System.out.printf("請輸入成績：");
                    float score = scanner.nextFloat();
                    classroom2[j][k] = score + "";
                }
            }
        }
    }
}