Write a C++ program using the concept of OOP for the addition of two Matrices of the same size

 Write a C++ program using the concept of OOP for the addition of two Matrices of the same size

Algorithm:

1. Create a class called "Matrix"
2. Define variables for rows, columns, and a 2D array to store the matrix elements
3. Create a constructor to initialize the rows and columns, and allocate memory for the 2D array
4. Create a method called "add" that takes another Matrix object as an argument, and performs the addition of the two matrices
5. Create a method called "display" to print the elements of the matrix
6. Create an object of the Matrix class and use the methods to add two matrices and display the result

C++ Program:

#include <iostream>
using namespace std;
 
class Matrix {
    int rows, columns;
    int **mat;
  public:
    Matrix(int r, int c) {
        rows = r;
        columns = c;
        mat = new int*[rows];
        for(int i = 0; i < rows; i++)
            mat[i] = new int[columns];
    }
    void add(Matrix b) {
        for(int i = 0; i < rows; i++)
            for(int j = 0; j < columns; j++)
                mat[i][j] += b.mat[i][j];
    }
    void display() {
        for(int i = 0; i < rows; i++) {
            for(int j = 0; j < columns; j++)
                cout << mat[i][j] << " ";
            cout << endl;
        }
    }
    ~Matrix() {
        for(int i = 0; i < rows; i++)
            delete[] mat[i];
        delete[] mat;
    }
};
 
int main() {
    int r, c;
    cout << "Enter the number of rows and columns: ";
    cin >> r >> c;
    Matrix a(r, c), b(r, c);
    cout << "Enter elements of first matrix: " << endl;
    for(int i = 0; i < r; i++)
        for(int j = 0; j < c; j++)
            cin >> a.mat[i][j];
    cout << "Enter elements of second matrix: " << endl;
    for(int i = 0; i < r; i++)
        for(int j = 0; j < c; j++)
            cin >> b.mat[i][j];
    a.add(b);
    cout << "Resultant matrix: " << endl;
    a.display();
    return 0;
}
 
/*
======Input/Output=====
 
Enter the number of rows and columns: 2 2
Enter elements of first matrix: 
1 2
3 4
Enter elements of second matrix: 
2 3
4 5
 
Resultant matrix: 
3 5
7 9
*/

#OOP

#HappyProgramming

#HappyCoding