gistfile1.txt

#include <iostream>
using namespace std;

int main() {
    const int rows = 3, cols = 4;
    int arr[rows][cols] = {
        {3, 5, 6, 7},
        {12, 1, 1, 1},
        {0, 7, 12, 1}
    };

    int rowSums[rows] = {0};
    int colSums[cols] = {0};
    int totalSum = 0;

    for (int i = 0; i < rows; i++) {
        for (int j = 0; j < cols; j++) {
            rowSums[i] += arr[i][j];
            colSums[j] += arr[i][j];
            totalSum += arr[i][j];
        }
    }

    for (int i = 0; i < rows; i++) {
        for (int j = 0; j < cols; j++) {
            cout << arr[i][j] << "\t";
        }
        cout << "| " << rowSums[i] << endl;
    }

    for (int j = 0; j < cols; j++) {
        cout << colSums[j] << "\t";
    }
    cout << "| " << totalSum << endl;

    return 0;
}