A.事物抽象 B.理論抽象 C.過(guò)程抽象 D.數(shù)據(jù)抽象
A.int[][] a; B.int a[] ; C.int[4][] a; D.int a[][4];
A.int[][] a = new int[2][]; B.int a[][] = new int[][]; C.int[] arr1[] = new int[2][2]; D.int[] arr1 = new int[2][];