打印6阶的杨辉三角

package explain;

public class YangHui {
// 打印6阶的杨辉三角
public static void main(String[] args) {
int rows = 6;
int[][] arrs = new int[rows][];
// 初始化
for (int i = 0; i < rows; i++) {
arrs[i] = new int[i + 1];
}
// 计算每行的值
for (int i = 0; i < rows; i++) {
for (int j = 0; j < arrs[i].length; j++) {
if (i == 0 || j == 0 || j == arrs[i].length - 1) {
arrs[i][j] = 1;

} else {
arrs[i][j] = arrs[i - 1][j - 1] + arrs[i - 1][j];
}
}
}
for (int i = 0; i < rows; i++) {
for (int j = 0; j < arrs[i].length; j++) {
System.out.print(arrs[i][j]+" ");
}
System.out.println("\n");
}

}

}