L1-039. 古风排版

4
This is a test case

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import java.util.Scanner;

public class Main {
    public static char[][] a = new char[1001][1001];

    public static void main(String[] args) {
        Scanner cin = new Scanner(System.in);
        int n = cin.nextInt();
        cin.nextLine();
        String str = cin.nextLine();
        int len = str.length();
        cin.close();
        int lie = len / n;
        if (len % n != 0) {
            ++lie;
        }
        int t = 0;
        for (int j = lie - 1; j >= 0; --j) {
            for (int i = 0; i < n; ++i) {
                if (t != len) {
                    a[i][j] = str.charAt(t++);
                } else {
                    a[i][j] = ' ';// 就是这里比较坑，我开始写的a[i][j]='\0'发现错误，一想\0根本不会输出，这里要输出空格
                }
            }
        }
        for (int i = 0; i < n; ++i) {
            for (int j = 0; j < lie; ++j) {
                System.out.print(a[i][j]);
            }
            System.out.println();
        }
    }
}