public class Crosssum {public static void main (String args []) {int [] [] a = {{1,2,3,4,5}, {6,7,8,9,10}, {11,12,13,14,15}, {16,17,18,19,20}, {21,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,19,20,20}; int transvers = 0; // 横 int vertikal = 0; // 竖 für (int i = 0; i <5; i ++) {transvers = transvers+a [2] [i]; // 通过下标访问} für (int j = 0; j <5; j ++) {vertical = vertikal+a [2] [j]; } System.out.println ("5*5 数组十字和为"+(transvers+vertikal)); }} public class LeftSum{ public static void main(String args[]){ int [][]a = {{1,2,3,4,5}, {6,7,8,9,10}, {11,12,13,14,15}, {16,17,18,19,20}, {21,22,23,24,25}} ; int sum = 0; für (int i = 0; i <5; i ++) {sum = sum+a [i] [i]; } System.out.println ("5*5 数组 ="+sum); }} public class RightSum{ public static void main(String args[]){ int [][]a = {{1,2,3,4,5}, {6,7,8,9,10}, {11,12,13,14,15}, {16,17,18,19,20}, {21,22,23,24,25}} ; int sum = 0; für (int j = 4; j> = 0; j-) {sum = sum+ a [j] [j]; } System.out.println ("5*5 数组 ="+sum); }}
