ex3_45.cpp

#include <iostream>

using std::cout;
using std::endl;

int main()
{
    int ia[3][4] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11};

    // a range for to manage the iteration
    for (auto& p : ia)
        for (int q : p) cout << q << " ";
    cout << endl;

    // ordinary for loop using subscripts
    for (size_t i = 0; i != 3; ++i)
        for (size_t j = 0; j != 4; ++j) cout << ia[i][j] << " ";
    cout << endl;

    // using pointers.
    for (auto p = ia; p != ia + 3; ++p)
        for (int* q = *p; q != *p + 4; ++q) cout << *q << " ";
    cout << endl;

    return 0;
}