Java 代码

import java.util.Scanner;

public class Main
{
    public static void main(String[] args)
    {
        Scanner cin = new Scanner(System.in);

        int n = cin.nextInt();
        int m = cin.nextInt();

        int[][] s = new int[n][m];

        int[] dx = {-1, 0, 1, 0};
        int[] dy = {0, 1, 0, -1};

        int d = 1;

        int x = 0;
        int y = 0; 
        for (int i = 1; i <= m*n; i++)
        {
            s [x][y] = i;

            int a = x + dx[d];
            int b = y + dy[d];

            if (a < 0 || b < 0 || a >= n || b >= m || s[a][b] > 0)
            {
                d = (d + 1) % 4;
                a = x + dx[d]; 
                b = y + dy[d];
            }

            x = a;
            y = b;
        }

        for (int i = 0; i < n; i ++)
        {
            for (int j = 0; j < m; j ++)
                System.out.print(s[i][j] + " ");
            System.out.print("\n");
        }
    }
}