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] + "\t");
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]+"\t");
}else {
arr[i][j] = arr[i-1][j-1]+arr[i-1][j];
System.out.print(arr[i][j]+"\t");
}
}
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