// Example 2-2 - 2D Arrays and Functions

#include <iostream>
#include <iomanip>
using namespace std;

const int Cols = 4;

void print2dArray(int [][Cols], int rows);
void print1ElementOf2dArray(int element);
void print1RowOf2dArray(int row[]);
void print1ColumnOf2dArray(int [][Cols], int rows, int col);

int main()
{
    const int Rows = 3;
    int a[Rows][Cols] = {{1,2,3,4},{5,6,7,8},{9,10,11,12}};

    // print the array
    print2dArray(a,Rows);

    // Print the second row
    cout << "The second row" << endl;
    print1RowOf2dArray(a[1]);

    // Print the second element in the third row
    cout << "The second element in the third row" << endl;
    print1ElementOf2dArray(a[2][1]);

    // Print the third column
    cout << "The third column" << endl;
    print1ColumnOf2dArray(a, Rows, 2);

    return 0;
}

void print2dArray(int A[][Cols], int rows)
{
    for (int i = 0; i < rows; i++)
    {
        for (int j = 0; j < Cols; j++)
            cout << setw(3) << A[i][j];
        cout << endl;
    }
    cout << endl;
}


void print1ElementOf2dArray(int element)
{
    cout << setw(3) << element << endl << endl;
}


void print1RowOf2dArray(int A[])
{
    for (int i = 0; i < Cols; i++)
        cout << setw(3) << A[i];
    cout << endl;
}


void print1ColumnOf2dArray(int A[][Cols], int rows, int col)
{
    for (int i = 0; i < rows; i++)
    {
        cout << setw(3) << A[i][col] << endl;
    }
    cout << endl;
}