C++ Vector
A vector in C++ is like a resizable array.
Both vectors and arrays are data structures used to store multiple elements of the same data type.
The difference between an array and a vector, is that the size of an array cannot be modified (you cannot add or remove elements from an array). A vector however, can grow or shrink in size as needed.
To use a vector, you have to include the <vector> header file:
// Include the vector library #include <vector>