#include <iostream>
#include <vector>

std::vector< std::vector<int> > make_table()
{ return { {1,2,3}, {4,5,6}, {7,8,9} } ; }

int main()
{
    auto table = make_table() ;
    for( const auto& row : table)
    {
        for( int v : row ) std::cout << v << ' ' ;
        std::cout << '\n' ;
    }
}