Vector usage in c++

vector.cpp

// init vector
vector <int> myVec(10);
//size of vector
int vSize = myVec.size();
// access to element n
myVec[0] = 1; // no buffer checking
myVec.at(1) = 2;
// resize vector
myVec.push_back(11); // extends vector by 1 and give it value of parameter
myVec.resize(myVec.size()+1); // extends vector by 1 and initializes last element with 0