题2

[java]代码库

import java.util.*;
public class Main {

    public static void main(String[] args) {
        final byte SIZE = 5;
	    int[][] base = new int [SIZE][SIZE];
        Random r = new Random();
        int key;
        double average=0;
        for(int i = 0; i<SIZE; ++i ){
            for(int j = 0; j<SIZE; ++j ) {
                key = r.nextInt(11) + 10;
                average += key;
                base[i][j] = key;
                if (j == SIZE - 1) {
                    System.out.println(key);
                } else {
                    System.out.print(key + " ");
                }
            }
        }
        average /= SIZE*SIZE;
        System.out.print(average);
    }
}