public class Main {
public static void main(String[] args) {
//1.声明并初始化二维数组
int[][] yangHui = new int[10][];
//2.给数组的元素赋值
for (int i = 0; i < yangHui.length; i++) {
yangHui[i] = new int[i + 1]; // <----- 注意这里 -----
System.out.print("长度:" + yangHui[i].length + "\n"); // <----- 打印看看便知道了 -----
//2.1 给首末元素赋值
yangHui[i][0] = yangHui[i][i] = 1;
//2.2 给每行的非首末元素赋值
//if(i > 1){
for (int j = 1; j < yangHui[i].length - 1; j++) {
yangHui[i][j] = yangHui[i - 1][j - 1] + yangHui[i - 1][j];
}
//}
}
//3.遍历二维数组
for (int i = 0; i < yangHui.length; i++) {
for (int j = 0; j < yangHui[i].length; j++) {
System.out.print(yangHui[i][j] + " ");
}
System.out.println();
}
}
}