public class YangHui {
    public static void main(String[] args){
        int yangHui[][] = new int[10][];
        for (int i = 0; i < yangHui.length;i++){
            yangHui[i] = new int[i + 1];
            for (int j = 0; j < yangHui[i].length; j++){
//                最初和最后的数值都是1
                if (j == 0 || j == yangHui[i].length -1){
                    yangHui[i][j] = 1;
                }else{
//                    上一行中间相加=下一行中间数值
                    yangHui[i][j] = yangHui[i - 1][j] + yangHui[i - 1][j - 1];
                }
            }
        }
        for (int i = 0; i < yangHui.length; i++){
            for (int j = 0; j < yangHui[i].length; j++){
                System.out.print(yangHui[i][j] + "\t");
            }
            System.out.println();
        }
    }
}