Example: Add Two 3x3 Matrices in C++

// Add Two 3x3 Matrices
#include <iostream>
using namespace std;

int main() {
    // Step 1: Declare three 3x3 integer matrices
    int matrixA[3][3];
    int matrixB[3][3];
    int sumMatrix[3][3];

    // Step 2: Get elements for the first matrix from the user
    cout << "Enter elements for the first 3x3 matrix (9 integers):" << endl;
    for (int i = 0; i < 3; ++i) {
        for (int j = 0; j < 3; ++j) {
            cout << "Enter element A[" << i << "][" << j << "]: ";
            cin >> matrixA[i][j];
        }
    }

    // Step 3: Get elements for the second matrix from the user
    cout << "\nEnter elements for the second 3x3 matrix (9 integers):" << endl;
    for (int i = 0; i < 3; ++i) {
        for (int j = 0; j < 3; ++j) {
            cout << "Enter element B[" << i << "][" << j << "]: ";
            cin >> matrixB[i][j];
        }
    }

    // Step 4: Perform matrix addition
    // Iterate through rows
    for (int i = 0; i < 3; ++i) {
        // Iterate through columns
        for (int j = 0; j < 3; ++j) {
            sumMatrix[i][j] = matrixA[i][j] + matrixB[i][j];
        }
    }

    // Step 5: Display the resulting sum matrix
    cout << "\nSum of the two matrices is:" << endl;
    for (int i = 0; i < 3; ++i) {
        for (int j = 0; j < 3; ++j) {
            cout << sumMatrix[i][j] << " ";
        }
        cout << endl; // Move to the next line after each row
    }

    return 0;
}