Java // 使用二维数组打印 10 行杨辉三角

            // 使用二维数组打印 10 行杨辉三角
            public static void main(String[] args) 
            {
                //1.声明 并初始化二维数组
                int[][]yanghui = new int[10][];
                
                
                
                //2.给数组元素赋值
                for(int i = 0; i<yanghui.length;i++)
                {
                    yanghui[i] = new int[i +1 ];
                
                //2.1给首末元素赋值
                yanghui[i][0] = 1;
                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();
                
                
            }