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}, {21,22,23,24,24},}; int transverse = 0; // 横 int vertical = 0; // 竖 para (int i = 0; i <5; i ++) {transverse = transverse+a [2] [i]; // 通过下标访问} para (int j = 0; j <5; j ++) {vertical = vertical+a [2] [j]; } System.out.println ("5*5 数组十字和为"+(transversal+vertical)); }} 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}, {21,22,23,24,24},}; int sum = 0; para (int i = 0; i <5; i ++) {sum = sum+a [i] [i]; } System.out.println ("5*5 数组 ="+suma); }} 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}, {21,22,23,24,24}, int sum = 0; for (int j = 4; j> = 0; j-) {sum = sum+ a [j] [j]; } System.out.println ("5*5 数组 ="+suma); }}
