Variables
Vectors in C++
C++ has a vector class within the std namespace. A vector is similar to an array, in a sense where a series of elements are stored with the same variable name. Unlike arrays, vectors are dynamically sized, which is a major advantage.
Syntax
vector<dataType> vectorName;
//if you want to provide a size
vector<dataType> vectorName(size);
//adding an item to a vector
vectorName.push_back(value);
//accessing an index of a vector
vectorName[index];
//changing a value at a certain index
vectorName[index] = value;Notes
Since a vector is within the std namespace, you either have to 'use' the namespace or type out std::vector.
Example
using namespace std;
//declaration
vector<int> powersOfTwo;
//adding members
powersOfTwo.push_back(1);
powersOfTwo.push_back(0);
powersOfTwo.push_back(4);
powersOfTwo.push_back(8);
//accessing
cout << "2 ^ 3 = " << powersOfTwo[3];
//accessing and changing
powersOfTwo[1] = 2;