[Cs3] end() vs cend()

[Mikhail Nesterenko]

CS3 students,

So end() returns a regular iterator while cend() returns a
const-iterator. Neither can be dereferenced. Howefver, decrements are
allowed for both iterators. After which a regular iterator can be used
to modify the element while a const-iterator may not be.


  vector <int> v = {1, 2, 3};
  *(v.end()  -1) =  4; // will work
  *(v.cend() -1) =  4; //will not work


Thanks,
-- 
Mikhail