c++ - Convert string to all uppercase leters with std::transform -

i'm using transform algorithm , std::toupper achieve this, can done in 1 line, ?

transform(s.begin(), s.end(), ostream_iterator<string>(cout, "\n"),std::toupper);

i error on this, have make unary function , call transform or can use adaptors ?

use ostream_iterator<char> instead of ostream_iterator<string>:

transform(s.begin(),s.end(),ostream_iterator<char>(cout,"\n"),std::toupper);

std::transform transforms each character , pass output iterator. why type argument of output iterator should char instead of std::string.

by way, each character printed on newline. want? if not, don't pass "\n".

note : may have use ::toupper instead of std::toupper.

see these

Expalin