Lecture 27

1. Lect 27 P. 1 Winter Quarter I/O Manipulation Lecture 27 Instructor notes: Lecture 27 deals with I/O Manipulation, in particular how to have more control over input and output than the basic cin and cout provide. We will look at stream manipulators, format state flags, and I/O stream member functions. Instructor notes: Lecture 27 deals with I/O Manipulation, in particular how to have more control over input and output than the basic cin and cout provide. We will look at stream manipulators, format state flags, and I/O stream member functions.

2. Lect 27 P. 2 Winter Quarter Stream I/O Library Header Files Note: There is no �.h� on standard header files. Be careful about �using namespace std� iostream -- contains basic information required for all stream I/O operations iomanip -- contains information useful for performing formatted I/O with parameterized stream manipulators fstream -- contains information for performing file I/O operations strstream -- contains information for performing in-memory I/O operations (i.e., into or from strings in memory) Instructor notes: Since this is starting a new lecture...it�s probably a good idea to remind people that header files in C++ do not require the �.h� extension and that to avoid (in an ANSI C++ strict environment) prefixing standard objects with �std::�, they need to indicate that the standard namespace is being used. We begin with an overview of the I/O library header files. iostream is the header file needed for all stream I/O iomanip lets us control I/O better by making stream manipulators available fstream lets us do file I/O strsteam lets us perform operations on strings that are already in memory Instructor notes: Since this is starting a new lecture...it�s probably a good idea to remind people that header files in C++ do not require the �.h� extension and that to avoid (in an ANSI C++ strict environment) prefixing standard objects with �std::�, they need to indicate that the standard namespace is being used. We begin with an overview of the I/O library header files. iostream is the header file needed for all stream I/O iomanip lets us control I/O better by making stream manipulators available fstream lets us do file I/O strsteam lets us perform operations on strings that are already in memory

3. Lect 27 P. 3 Winter Quarter Classes for Stream I/O in C++ ios is the base class. istream and ostream inherit from ios ifstream inherits from istream (and ios) ofstream inherits from ostream (and ios) iostream inherits from istream and ostream (& ios) fstream inherits from ifstream, iostream, and ofstream