istream_iterato r and ostream_iterato r problem

[Chris Mantoulidis]

Hello all... I get an error message for the following program by the
compiler:

#include <iostream>
#include <string>

using namespace std;

ostream_iterato r<string> oo(cout);

int main()
{
*oo = "Hello ";
++oo;
*oo = "world!\n";

return 0;
}

the error says: "ostream_iterat or is used as a type, but is not
defined as a type."... What can I do to fix that?? I get the same
error with istream_iterato r...

cmad

[Rob Williscroft]

Chris Mantoulidis wrote in news:a8587dd9.0 312132333.52617 1b8
@posting.google .com:

Hello all... I get an error message for the following program by the
compiler:

#include <iostream>
#include <string>

#include <iterator>
using namespace std;

ostream_iterato r<string> oo(cout);

int main()
{
*oo = "Hello ";
++oo;
*oo = "world!\n";

return 0;
}

the error says: "ostream_iterat or is used as a type, but is not
defined as a type."... What can I do to fix that?? I get the same
error with istream_iterato r...

std::ostream_it erator is declared in <iterator>.

HTH

Rob.
--
http://www.victim-prime.dsl.pipex.com/

[Jord]

>>>>> ">>" == Chris Mantoulidis <cm****@yahoo.c om> writes:

Hello all... I get an error message for the following program by the
compiler: #include <iostream>
#include <string>

using namespace std;

ostream_iterato r<string> oo(cout);
int main()
{
*oo = "Hello ";
++oo;
*oo = "world!\n";
return 0;
} the error says: "ostream_iterat or is used as a type, but is not
defined as a type."... What can I do to fix that?? I get the same
error with istream_iterato r... cmad

Chris,

You need to include <iterator>!

ostream_iterato r exists as a unique template class as compared to the
iterators of STL containers which use traits to create their own nested
iterator classes, hence the scope resolution operator "::" when these are
instantiated, eg.

vector<int> my_vec(10);
// ...
vector<int>::it erator my_vec_itor = my_vec.begin();

.... you could even use a little more of the STL:

#include <iostream>
#include <iterator>
#include <string>
#include <vector>

using namespace std;

int main()
{
vector<string> oo_vec;
oo_vec.push_bac k("Hello ");
oo_vec.push_bac k("world!\n") ;
copy(oo_vec.beg in(), oo_vec.end(), ostream_iterato r<string>(cout) );

return 0;
}

J.
--