Re: C++ Primer ex 9.14
James Kanze wrote:
On Sep 16, 1:02 pm, Erik Wikstr?m <Erik-wikst...@telia.com> wrote:
[...]
It runs fine. Is there any way I can replace what while loop with
std::copy ?
Might be, you would have to use std::istream_iterators and a back insert
iterator to add the elements to the vector, something like (untested):
std::copy(
std::istream_iterator<std::string>(std::cin),
std::istream_iterator<std::string>() // The same as end() for a stream
std::back_insert_iterator<std::vector>(vec)
);
Even simpler would be to use the istream_iterators to initialize
the container. Something like:
std::vector< std::string > vec(
(std::istream_iterator< std::string >( std::cin )),
^ ^
if it's not for formatting, then it's
not necessary as std::cin is not a type,
(std::istream_iterator< std::string >()) ) ;
(Note that the outermost parentheses around the arguments are
necessary to prevent the compiler from interpreting the
statement as a function declaration.)
and it's not a function declaration I think. As "TypeA ()" is a function
type who returns "TypeA". So if the compiler wrongly interpret this way,
then it will report that "passing a type is illegal" (I just made this
wording :-) )
it only happens to those with none parameter like the latter one you wrote.
--
Thanks
Barry
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