#include <vector>
#include <iostream>
using namespace std;

//   Using range-based for-loop in the "PrintVect" function
template <typename T>
void PrintVect(const vector<T>& v)
{
   for (T value : v)		// c++11 - range-based for
      cout << value << ' ';

   cout << '\n';
}

int main()
{
   vector<int> v1;		// declaring vector of ints, empty
   vector<int> v2(10);		// declaring vector of size 10
   vector<int> v3{100};		// declaring a vector with one element, 100
   
   // declaring a vector that stores ten even numbers already
   vector<int> v4{2, 4, 6, 8, 10, 12, 14, 16, 18, 20};

   // printing the vectors to show contents.  
   cout << "v1 = ";
   PrintVect(v1);

   cout << "v2 = ";
   PrintVect(v2);

   cout << "v3 = ";
   PrintVect(v3);

   cout << "v4 = ";
   PrintVect(v4);


}