From C arrays to C++ vectors

The C++ STL (Standard Template Library) includes some very useful templates. The main idea behind STL is to re-use some of the best implementations of the most common data structures, such as queues, lists, stacks. One of these implementations is the C++ vector.

In C, we could declare an array of integers like this:

int grades[MAX_SIZE];

This statement will still work with C++, and is still valid. However, a more "C++"-centric way of doing the same thing would be to use vectors:

vector<int> grades(MAX_SIZE);

You can still access each element using:

grades[i]

but now you can use STL vector functions.