C++ Extract the contents of an istream and copy to another

Question

I was wondering how I would go about sucking out the contents of one istream and saving it in another istream. It seems explicit copying doesn't seem to work for streams, so I was wondering if this could be achieved instead.

Answer 1

Looks like you just want a change buffers:

int main()
{
    std::istream copy(nullptr);
    copy.rdbuf(std::cin.rdbuf());
    std::cin.rdbuf(nullptr);

    for (std::string word; copy >> word; ) {
        std::cout << word << ' ';
    }
}