How to iterate first ten items from the container

Question

I want to print only first 10 inserted items while leaving the rest behind. What code do i have to use (instead of using myset.end() ) to print only first 10 integers instead of printing every single integer.

int main ()
{
std::set<int> myset;
std::set<int>::iterator it;

// set some initial values:
for (int i=1; i<=20; ++i) 
    myset.insert(i*10);    

std::cout << "myset contains:";
for (it=myset.begin(); it!=myset.end(); ++it)
std::cout << *it << ' ';
std::cout << "\n\n";

return 0;
}

Answer 1

You might use std::next as follow:

const auto begin = myset.begin();
const auto end = myset.size() < 10 ? myset.end() : std::next(begin, 10);
for (auto it = begin; it != end; ++it) {
    std::cout << *it << ' ';
}