1	CS 211: Introduction to Computer Programming II Instructor: Brian M. Dennis Teaching Assistants: Tom Lechner, Bin Lin, Rachel Goldsborough http://www.cs.northwestern.edu/~bmd/cs211/
2	Streams Already using them cout << "foo"; cin >> some_int; Today, more sophisticated uses Participate in a hierarchy of classes Forward reference inheritance
3	Stream Hierarchy
4	Stream member functions ostream put, takes a char, returns ostream ref istream get, no args returns next char get, char ref stores next char get, char*, size, delimeter up to terminator or buf size getline, no args,
5	Stream member functions istream cont ignore putback peek
6	Stream member functions #include <iostream> using std::cout; using std::cin; using std::endl; int main() { const int SIZE = 80; char buf1[SIZE]; char buf2[SIZE]; cout << "Enter a sentence:" << endl; cin >> buf1; cout << "\nThe string read with cin was:" << endl << buf1 << endl << endl;
7	Stream member functions cin.get(buf2, SIZE); cout << "The string read with cin.get was:" << endl << buf2 << endl; cin.getline(buf2, SIZE); cout << "\nThe sentence read with getline is:" << endl << buf2 << endl; return 0; }
8	Unformatted I/O output write, member function cout.write(buf); cout.write(buf, size) input read, member function cout.read(buf, sz);
9	Stream manipulators Integer output base dec, oct, hex manip setbase member function Floating point precision # of right digits displayed setprecision manip precision member function Field manipulations width member func, setw manip skipws, noskipws left, right showbase, noshowbase showpoint, noshowpoint scientific, fixed
10	Stream flags cin.eof() Any input left? cin.fail() Error on input cin.bad() major error cin.good() bad, fail, eof all off cout.rdstate() Get flags as an integer cin.clear() reset flags operator! test badbit, failbit
11	That’s a Wrap Reading 12.1 – 12.7