How to print an entire istream to standard out and string

Question

How do you print an istream variable to standard out. [EDIT] I am trying to debug a scenario wherein I need to ouput an istream to a log file

Answer 1

You ouput the istream's streambuf.

For example, to output an ifstream to cout:

std::ifstream f("whatever");
std::cout << f.rdbuf();