Example: Matrix Addition using 2D Arrays in C++

// Matrix Addition using 2D Arrays
#include <iostream>
using namespace std;

int main() {
    // Define matrix dimensions
    const int ROWS = 3;
    const int COLS = 3;

    // Declare two input matrices and one result matrix
    int matrix1[ROWS][COLS];
    int matrix2[ROWS][COLS];
    int sumMatrix[ROWS][COLS];

    // Step 1: Input elements for the first matrix
    cout << "Enter elements for Matrix 1 (" << ROWS << "x" << COLS << "):" << endl;
    for (int i = 0; i < ROWS; ++i) {
        for (int j = 0; j < COLS; ++j) {
            cout << "Enter element matrix1[" << i << "][" << j << "]: ";
            cin >> matrix1[i][j];
        }
    }

    // Step 2: Input elements for the second matrix
    cout << "\nEnter elements for Matrix 2 (" << ROWS << "x" << COLS << "):" << endl;
    for (int i = 0; i < ROWS; ++i) {
        for (int j = 0; j < COLS; ++j) {
            cout << "Enter element matrix2[" << i << "][" << j << "]: ";
            cin >> matrix2[i][j];
        }
    }

    // Step 3: Add corresponding elements of matrix1 and matrix2
    for (int i = 0; i < ROWS; ++i) {
        for (int j = 0; j < COLS; ++j) {
            sumMatrix[i][j] = matrix1[i][j] + matrix2[i][j];
        }
    }

    // Step 4: Display the sumMatrix
    cout << "\nSum of the two matrices is:" << endl;
    for (int i = 0; i < ROWS; ++i) {
        for (int j = 0; j < COLS; ++j) {
            cout << sumMatrix[i][j] << " ";
        }
        cout << endl; // Move to the next row after printing all elements in the current row
    }

    return 0;
}