c++ experiment : does cin split on any whitespace, or on newline? ( answer : whitespace )

words.cpp

#include <iostream>
#include <string>

int main() {

  std::string word;
  int i;

  std::cout << "enter 3 words: ";
  for ( i = 0; i < 3; ++i ) {
    std::cin >> word;
    std::cout << word << "\n";
  }
}

words.txt

enter 3 words: one two three
one
two 
three