Creating a new C++ subvector?

Question

Say I have a vector with values [1,2,3,4,5,6,7,8,9,10]. I want to create a new vector that refers to, for example, [5,6,7,8]. I imagine this is just a matter of creating a v

Answer 1

One of std::vector's constructor accepts a range:

std::vector v;

// Populate v.
for (int i = 1; i <= 10; i++) v.push_back(i);   

// Construct v1 from subrange in v.
std::vector v1(v.begin() + 4, v.end() - 2);