HP Integrity NonStop J-Series - Manual (Page 56)

Click on the banner to return to the user guide home page.
©Copyright 1996 Rogue Wave Software
String I/O
Class RWCString offers a rich I/O facility to and from both iostreams and Rogue Wave virtual
streams.
iostreams
The standard left-shift and right-shift operators have been overloaded to work with iostreams and
RWCString s:
ostream&operator<<(ostream& stream, const RWCString& cstr);
istream&operator>>(istream& stream, RWCString& cstr);
The semantics parallel the operators:
ostream&operator<<(ostream& stream, const char*);
istream&operator>>(istream& stream, char* p);
which are defined by the Standard C++ Library that comes with your compiler. In other words,
the left-shift operator << writes a null-terminated string to the given output stream. The
right-shift operator >> reads a single token, delimited by white space, from the input stream into
the
RWCString , replacing the previous contents.
Other functions allow finer tuning of RWCString input [2] . For instance, function readline() reads
strings separated by newlines. It has an optional parameter controlling whether white space is
skipped before storing characters. You can see the difference skipping white space makes in the
following example:
#include
#include
#include
main(){
RWCString line;
{ int count = 0;
ifstream istr("testfile.dat");
while (line.readLine(istr)) // Use default value:
// skip whitespace