Computer Applications
Write a class program with the following specifications:
Class name — Matrix
Data members — int array m[][] with 3 rows and 3 columns
Member functions:
- void getdata() — to accept the numbers in the array
- void rowsum() — to find and print the sum of the numbers of each row
- void colsum() — to find and print the sum of numbers of each column
Use a main function to create an object and call member methods of the class.
Java
Encapsulation & Inheritance in Java
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Answer
import java.util.Scanner;
public class Matrix
{
private final int ARR_SIZE = 3;
private int[][] m;
public Matrix() {
m = new int[ARR_SIZE][ARR_SIZE];
}
public void getdata() {
Scanner in = new Scanner(System.in);
for (int i = 0; i < ARR_SIZE; i++) {
System.out.println("Enter elements of row "
+ (i+1) + ":");
for (int j = 0; j < ARR_SIZE; j++) {
m[i][j] = in.nextInt();
}
}
}
public void rowsum() {
for (int i = 0; i < ARR_SIZE; i++) {
int rSum = 0;
for (int j = 0; j < ARR_SIZE; j++) {
rSum += m[i][j];
}
System.out.println("Row " + (i+1) + " sum: " + rSum);
}
}
public void colsum() {
for (int i = 0; i < ARR_SIZE; i++) {
int cSum = 0;
for (int j = 0; j < ARR_SIZE; j++) {
cSum += m[j][i];
}
System.out.println("Column " + (i+1) + " sum: " + cSum);
}
}
public static void main(String args[]) {
Matrix obj = new Matrix();
obj.getdata();
obj.rowsum();
obj.colsum();
}
}Variable Description Table
Program Explanation
Output
![BlueJ output of Write a class program with the following specifications: Class name — Matrix Data members — int array m[][] with 3 rows and 3 columns Member functions: (a) void getdata() — to accept the numbers in the array (b) void rowsum() — to find and print the sum of the numbers of each row (c) void colsum() — to find and print the sum of numbers of each column Use a main function to create an object and call member methods of the class.](https://cdn1.knowledgeboat.com/img/apc10/chap_8-p4.webp "BlueJ output of Write a class program with the following specifications: Class name — Matrix Data members — int array m[][] with 3 rows and 3 columns Member functions: (a) void getdata() — to accept the numbers in the array (b) void rowsum() — to find and print the sum of the numbers of each row (c) void colsum() — to find and print the sum of numbers of each column Use a main function to create an object and call member methods of the class.")
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