Iterator in loop

[sivayella]

int main()
{
std::vector<int > vec;
vector<int>::it erator iter;
for (int i = 0 ; i < 5 ; i++)
{
vec.push_back(i +10);
}
for (iter = vec.begin() ; iter != vec.end(); iter++)
{
if (*iter == 12 || *iter == 13)
{
vec.erase(iter) ;
}
}
for (iter = vec.begin() ; iter != vec.end(); iter++)
{
printf("%d", *iter);
}
return 0;
}

What happens to the iterator when it is incrementedin loop, after erasing 12?

Actually i want to understand the behaviour of the iterator when the element it is pointing to is deleted.

[D_C]

Straight from the STL documentation

[5] A vector's iterators are invalidated when its memory is reallocated. Additionally, inserting or deleting an element in the middle of a vector invalidates all iterators that point to elements following the insertion or deletion point. It follows that you can prevent a vector's iterators from being invalidated if you use reserve() to preallocate as much memory as the vector will ever use, and if all insertions and deletions are at the vector's end.