#include <iostream>
using namespace std;

void print_matrix(const double (&m)[4][5])
{
    for(int i = 0; i < 4; ++i)
    {
        for(int j = 0; j < 5; ++j)
        {
            cout << m[i][j] << '\t';
        }
        cout << endl;
    }
}

int main()
{
    double m[4][5] = 
    {
        {2, 3, 4, 5, 6},
        {1, 0, 0, 6, 0},
        {0, 0, 2, 9, -6},
        {9, 8, 7, 6, 5},
    };
    print_matrix(m);
    return 0;
}