1 import java.util.Scanner; 2 3 public class Yanghui { 4 public static void main(String[] args) { 5 Scanner sc = new Scanner(System.in); 6 System.out.println("请输入行列数"); 7 int num = sc.nextInt(); 8 int[][] a = new int[num][num]; 9 for (int i = 0; i < a.length; i++) { 10 for (int j = 0; j < i + 1; j++) { 11 // 输出所有的1,其他的数再想办法 12 a[i][0] = 1; 13 a[i][i] = 1; 14 if (i >= 2 && j >= 1) { 15 // 从第三行起,中间的不等于1的数的值其实是上一个一位数组的两个相邻元素的和 16 a[i][j] = a[i - 1][j - 1] + a[i - 1][j]; 17 } 18 System.out.print(a[i][j] + " "); 19 } 20 System.out.println(); 21 } 22 } 23 } 24 请输入行列数 25 4 26 1 27 1 1 28 1 2 1 29 1 3 3 1
public class MyYanghui { public static void main(String[] args) { int num = 8; int[][] arr =new int[num][num]; for(int i =0;i<arr.length;i++) { for(int j=0;j<=i;j++) { if(j==0||i==j) { arr[i][j]=1; System.out.print(arr[i][j]+" "); }else { arr[i][j] = arr[i-1][j-1]+arr[i-1][j]; System.out.print(arr[i][j]+" "); } } System.out.println(); } } } 1 1 1 1 2 1 1 3 3 1 1 4 6 4 1 1 5 10 10 5 1 1 6 15 20 15 6 1 1 7 21 35 35 21 7 1