Example: MatrixRowColumnSum in C++

// MatrixRowColumnSum
#include <iostream>
#include <vector> // Using vector for dynamic arrays, or fixed-size array can be used

using namespace std;

int main() {
    // Step 1: Define the matrix dimensions and elements
    const int ROWS = 3;
    const int COLS = 4;
    
    // Initialize a 2D array (matrix)
    int matrix[ROWS][COLS] = {
        {10, 20, 15, 30},
        {5,  25, 35, 40},
        {12, 18, 22, 28}
    };

    cout << "Original Matrix:" << endl;
    for (int i = 0; i < ROWS; ++i) {
        for (int j = 0; j < COLS; ++j) {
            cout << matrix[i][j] << "\t";
        }
        cout << endl;
    }
    cout << endl;

    // Step 2: Calculate and display sum of each row
    cout << "Row Sums:" << endl;
    for (int i = 0; i < ROWS; ++i) { // Loop through each row
        int rowSum = 0; // Initialize sum for the current row
        for (int j = 0; j < COLS; ++j) { // Loop through each element in the current row
            rowSum += matrix[i][j];
        }
        cout << "Sum of Row " << i + 1 << ": " << rowSum << endl;
    }
    cout << endl;

    // Step 3: Calculate and display sum of each column
    cout << "Column Sums:" << endl;
    for (int j = 0; j < COLS; ++j) { // Loop through each column
        int colSum = 0; // Initialize sum for the current column
        for (int i = 0; i < ROWS; ++i) { // Loop through each element in the current column
            colSum += matrix[i][j];
        }
        cout << "Sum of Column " << j + 1 << ": " << colSum << endl;
    }

    return 0;
}