Initialize Vector Iterator with end() function
To initialize a vector iterator using the end()
function in C++, you can follow these steps:
- Define a vector of your desired type. For example,
std::vector<int> myVector;
. - Use the
end()
function to obtain an iterator pointing to the element just past the last element of the vector. This iterator represents the "end" of the vector. - Example:
std::vector<int>::iterator it = myVector.end();
orauto it = myVector.end();
. Here,it
is the iterator variable that will hold the end iterator. - You can now use the iterator
it
to perform various operations on the vector. However, note that the end iterator is not dereferenceable, so you cannot access the value it points to directly. - Example:
it--;
to point to the last valid element in the vector. - Example:
for (auto iter = myVector.begin(); iter != it; ++iter) { ... }
to iterate over the vector from the beginning to the element just before the end. - Example:
if (it == myVector.end()) { ... }
to check if the iterator is at the end of the vector.
By using the end()
function, you can conveniently obtain an iterator pointing to the element just past the last element of the vector, allowing you to perform operations on the vector without accessing invalid memory locations.