// 导入 Scanner 类 import java.util.Scanner; // 定义公开类 Test public class Test{ public static void main(String[]args){ Scanner reader=new Scanner(System.in); int n=reader.nextInt(); int a[][]=new int[100][100]; for(int i=0;i<100;i++){ a[0][0]=1; System.out.printf("%" + ((n - i) * 2) + "s",""); for(int j=0;j<=i;j++){ if(i==j || j==0) a[i][j]=1; else a[i][j]=a[i-1][j]+a[i-1][j-1]; System.out.printf("%4d",a[i][j]); } System.out.println(); } } } // 定义主方法 main，在该方法中完成本关任务

As an AI language model, I do not have a physical form or personality. I exist solely as a program designed to provide responses to user inputs based on machine learning algorithms. Therefore, the concept of "null" does not apply to me in the same way as it might to a human being. However, in computer programming, "null" typically refers to a value that represents the absence or lack of a meaningful value or object.