Stream's failbit

If a stream's failbit is set, every operation on that stream is a no-op until the failbit is cleared.

Reference: The C++ Standard Library: A Tutorial and Reference by Nicolai M. Josuttis. Addison-Wesley, 1999, p. 599.

Exceptions

After catching an exception with catch (...){}, you can get the what() data if you rethrow the exception and catch it with an exception type.

cin

The following are member functions of cin: get(), getline(), read() and readsome().

Reference: The C++ Standard Library: A Tutorial and Reference by Nicolai M. Josuttis Addison-Wesley, 1999, p. 607.

Argument Dependent Lookup (ADL)

The following code compiles:

#include <iostream> 
int main() {endl(std::cout);}

Note that there is no 'std::' in front of endl and endl is being called like a function. Since the parameter to endl specifies the namespace, ADL (Argument Dependent Lookup aka Koenig Look) looks first for the function in the namespace of the parameter, which in this case is std. It is nicer to specify the 'std::' though.

Reference: The C++ Standard Library: A Tutorial and Reference by Nicolai M. Josuttis. Addison-Wesley, 1999, p. 613.

Stream's imbue() member function

A stream's imbue() member function sets the locale object.

Reference: "The C++ Standard Library" by Nicolai M. Josuttis. Addison-Wesley, 1999, p. 626.

ios_base flags

ios_base flags to the C Mode flags mapping: in->"r", out or out|trunc->"w", out|app->"a",in|out->"r+",in|out|trunc->"w+"

Reference: C++ Standard Library, The: A Tutorial and Reference, MobiPocket by Nicolai M. Josuttis. Addison-Wesley, 1999, p. 632.

Streams

If you close then re-open a stream, the stream's state flags are not cleared.

Reference: The C++ Standard Library: A Tutorial and Reference by Nicolai M. Josuttis. Addison-Wesley, 1999, p. 634.