c++ - Iteration: Invalid operands to binary expression -

i trying iterate through set of strings, declared here:

std::set<std::string>ab;, , here std::set<int>::iterator iter;

the problem here:

for(iter = ab.begin(); iter != ab.end(); ++iter) {     std::cout << *iter << n; 

in theory, should print out contents of ab (available buildings), instead, gives 2 errors:

error: no viable overloaded '=' -> [ for(iter = ab.begin(); ]

and

error: invalid operands binary expression -> [ std::set< int >::iterator ]

any appreciated, thanks.

instead of

std::set<int>::iterator iter; 

use

std::set<std::string>::iterator iter; 

since using c++11, can use:

for(auto iter = ab.begin(); iter != ab.end(); ++iter) {     std::cout << *iter << n; 

better yet, use range construct:

for(auto const& item : ab) {     std::cout << item << n;