dynamiczna tablica z dynamicznych tablic

int ** tab;

const unsigned int szerokosc = 10;
const unsigned int wysokosc = 10;

int ** tab;
tab = new int *[ szerokosc ];
for( unsigned int i = 0; i < szerokosc; ++i )
     tab[ i ] = new int[ wysokosc ];

for( unsigned int i = 0; i < szerokosc; ++i )
     delete[] tab[ i ];

delete[] tab;

#include <iostream>
#include <vector>

typedef std::vector < int > vectorInt;

int main()
{
    std::vector < vectorInt > ints;
   
    vectorInt int1, int2;
    int1.push_back( 69 );
    int1.push_back( 666 );
   
    int2.push_back( 777 );
    int2.push_back( - 1 );
   
    ints.push_back( int1 );
    ints.push_back( int2 );
   
    for( std::vector < vectorInt >::iterator it = ints.begin(); it != ints.end(); ++it )
    {
        for( std::vector < int >::iterator it2 = it->begin(); it2 != it->end(); ++it2 )
        {
            std::cout <<* it2 << std::endl;
        }
        std::cout << "==========" << std::endl;
    }
   
    std::cin.sync();
    std::cin.get();
    return 0;
}

class MyClass {
public:
    std::vector < std::vector < int > > vec;
};

std::vector < std::vector < int > > vec;
vec.resize( 1 );
vec[ 0 ].push_back( 12345 );
printf( "%d\n", vec[ 0 ][ 0 ] );