C语言程序设计教程（第三版）课后习题7.3 （Java代码）

import java.util.Scanner;

public class Main {

        public static void Sum(int[][] array){

                int sum = 0;

                int sumA = 0;

                for(int i=0;i<3;i++){

                        for(int j=0;j<3;j++){

                                if(i==j)

                                        sum+=array[i][j];

                                if(i+j==2)

                                        sumA+=array[i][j];

                        }

                }

        System.out.println(sum+" "+sumA);

        }

        public static void main(String[] arg){

                Scanner sc = new Scanner(System.in);

                int[][] array = new int[3][3];

                        for(int i=0;i<3;i++){

                                for(int j=0;j<3;j++){

                                        array[i][j] = sc.nextInt();

                                }

                        }

                Sum(array);

        }

}