No matching constructor for initalization of 'ostream_iterator'

Question

for the code, why error, osteam_iterator is a template class ,why no matching constructor for initalization of \'ostream_iterator\', please give a help , thank you. define o

Answer 1

ostream_iterator constructor takes const CharT* delim as second parameter:

ostream_iterator(ostream_type& stream, const CharT* delim) (1)

ostream_iterator(ostream_type& stream) (2)

To make your code work, you need to pass in a string:

std::copy(sentence1.begin(), sentence1.end(), std::ostream_iterator(cout, "1"));
//                                                                             ^^^^