Thread: STL to: Cin, Cout, ifstream & ofstream

Hello.
I am very close to getting my program working. I would like to know how to send something from an STL container to:

1) cin
2) cout

and especially

3) ifstream
4) ofstream

ofstream temp;
std::string text;

temp << text // this does not work.

It seems I cannot use the sample approach with STL as character array or string.

Do I need to implement an iterator?

Kuphryn

You can't output to an input stream, thats why

ifstream temp;
std::string text;

temp << text; // this does not work.
temp >> text; // works

You can define << and >> operators for streams and STL container classes if you want to.

std::string already has the << and >> operators defined, so there's no reason that temp << text shouldn't work.

For the other STL containers you can access the elements using the [] operator if one is defined or using the relevant iterator(you don't have to implement you own), and send them to an output stream if the object type in the container has the << operator defined.