【JAVA】 基础练习 BASIC-6 杨辉三角形

解决思路:下一排数组各值等于上一行数组两肩的和,并且开头和结尾都是1

import java.util.Arrays;
import java.util.Scanner;

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

System.out.println(1);
int[] arr = {1,1};
int[] arrr = {1,1};
int arrLen = 2;
for (int i = 0; i < len-1; i++) {
System.out.println(Arrays.toString(arrr).replace("[", "").replace("]", "").replace(",", ""));
arrr = new int[++arrLen];
for (int j = 0; j < arrLen; j++) {
try {
arrr[j] = arr[j] + arr[j-1];
} catch (ArrayIndexOutOfBoundsException e) {
try {
arrr[j] = 1;
} catch (ArrayIndexOutOfBoundsException e2) {
arrr[j] = 1;
}
}
}
arr = arrr;
}
}
}