C++ cout auto separator

Question

I am wondering if there is way that std::cout automatically will insert some predefined value between printed sequences.

For example:

st         


        

Answer 1

If you're just looking for a way to print a vector with its elements properly delimited (and without an extra delimiter at the end), try this:

#include 
#include 

int main()
{
  std::vector v{1, 2, 3};

  auto it = v.begin();
  if (it != v.end())
  {
    std::cout << *it;
    ++it;
  }

  for (; it != v.end(); ++it)
  {
    std::cout << ", " << *it;
  }
}