学步园

 int  [ ][ ] j2;  //不规则的数组：数组的数组

int [ ][ ] j2 =new int [3][ ];

 int[][] j2 = new int[3][];
            j2[0] = new int[] {1,2,3 };
            j2[1] = new int[] { 4,5,6,7};
            j2[2] = new int[] {8,9,10,11,12 };

            int i, j;
            for (i=0;i<j2.Length;i++)
            {
                for (j = 0; j < j2[i].Length;j++ )
                {
                     Console.WriteLine("{0}",j2[i][j]);
                }
          
            }

            Console.ReadLine();