杨辉三角形 隔行对齐

今天接触了个招聘的，先要写个杨辉三角形 并隔行对齐

 

所以就临时写了个（当然也借鉴了网上的资源~~~~~）

 

大约用了20分钟。。。。

 

总结： 先把3行的隔行对齐弄出来 多行的也就ok了

public class YangHuiSJ {
    public static void main(String[] args) {
        int row = 30;
        int[][] a = new int[row][row];
        for (int i = 0; i < row; i++)
            for (int j = 0; j < row; j++) {
                if (j < i) {
                    a[i][j] = 1;
                    if (j == 0) {
                        a[i][j] = 1;
                    } else {
                        a[i][j] = a[i - 1][j - 1] + a[i - 1][j];
                    }
                } else {
                    a[i][j] = 1;
                }
            }

        for (int i = 0; i < row; i++) {
            for (int x = 0; x <row-i; x++) {
                System.out.print("         ");
            }
            for (int j = 0; j <= i; j++) {
                System.out.printf("%9d",a[i][j]);
                System.out.print("         ");
            }
            System.out.printf("/n");
        }
    }
}