Example: AddTwo4x4Matrices in C++

// AddTwo4x4Matrices
#include <iostream>
using namespace std;

int main() {
    const int SIZE = 4; // Define matrix size

    // Step 1: Declare and initialize two 4x4 matrices
    int matrixA[SIZE][SIZE] = {
        {1, 2, 3, 4},
        {5, 6, 7, 8},
        {9, 1, 2, 3},
        {4, 5, 6, 7}
    };

    int matrixB[SIZE][SIZE] = {
        {7, 6, 5, 4},
        {3, 2, 1, 0},
        {1, 2, 3, 4},
        {5, 6, 7, 8}
    };

    // Step 2: Declare a 4x4 matrix to store the sum
    int sumMatrix[SIZE][SIZE];

    // Step 3: Print matrixA for verification
    cout << "Matrix A:" << endl;
    for (int i = 0; i < SIZE; ++i) {
        for (int j = 0; j < SIZE; ++j) {
            cout << matrixA[i][j] << " ";
        }
        cout << endl;
    }
    cout << endl;

    // Step 4: Print matrixB for verification
    cout << "Matrix B:" << endl;
    for (int i = 0; i < SIZE; ++i) {
        for (int j = 0; j < SIZE; ++j) {
            cout << matrixB[i][j] << " ";
        }
        cout << endl;
    }
    cout << endl;

    // Step 5: Perform matrix addition using nested loops
    // Iterate through rows
    for (int i = 0; i < SIZE; ++i) {
        // Iterate through columns
        for (int j = 0; j < SIZE; ++j) {
            sumMatrix[i][j] = matrixA[i][j] + matrixB[i][j];
        }
    }

    // Step 6: Print the resulting sumMatrix
    cout << "Sum of Matrix A and Matrix B (sumMatrix):" << endl;
    for (int i = 0; i < SIZE; ++i) {
        for (int j = 0; j < SIZE; ++j) {
            cout << sumMatrix[i][j] << " ";
        }
        cout << endl;
    }

    return 0;
}