CODEWITHSUNDEEP
c++algorithmc++11stdvectorstd
Botond Hegyi
Botond Hegyi

Reputation: 81

How to print out the contents of a std::vector with std::copy_n?

I want to print out the contents of a std::vector in C++.

Here is what I have:

#include <iostream>
#include <iterator>
#include <vector>
#include <algorithm>

using namespace std;

int main()
{
  vector<int> v;
  copy_n(istream_iterator<int>(cin), 5, back_inserter(v));

  return 0;
}

Can I print the contents of the std::vector with the same method?

Upvotes: 1

Views: 349

Answers (2)

songyuanyao
songyuanyao

Reputation: 172894

Yes, you can do it by passing the iterator and the size of the vector and std::ostream_iterator to std::copy_n.

std::copy_n(v.begin(), v.size(), std::ostream_iterator<int>(std::cout, " "));

Upvotes: 2

JeJo
JeJo

Reputation: 32722

Yes. You need to iterate through the vector and std::copy the contents to the output stream with the help of std::ostream_iterator.

std::copy(v.begin(), v.end(), std::ostream_iterator<int>(std::cout, " "));

See live

Upvotes: 4

Related Questions