2d vector

[supraba]

How do I iterate through a two dimensional vector?
To iterate through and print the elements of a single dimensional vector I use,

vector<int> a;
for(vector<int>::iterator it=a.begin();it<a.end();it++)
    cout<<*it;

How do I do the same for a two dimensional Vector?

[iQChange]

vector<vector<int>> B;
for(vector<vector<int>>::iterator it=B.begin();it<B.end();it++)
for(vector<int>::iterator it_=it.begin();it_<it.end();it_++)
    cout<<*it_;

And, instead of < , you should compare the iterator to the end with !=

[cire]

Or, C++11:

std::vector<std::vector<int>> v ;

for ( auto& row : v )
   for ( auto element : row )
       std::cout << element ;