vectors.cpp
#include <vector>
// vector to store int
vector<int> vec;
// size of vector
cout << vec.size() << endl;
// 0
// push values into vector
for (int i = 1; i <= 5; i++) {
vec.push_back(i);
}
// new size of vector
cout << vec.size() << endl;
// 5
// access value in vector
cout << vec[0] << endl;
// 1