Hi Ernest. "strstream has been deprecated in the C++98 standard because the standards committee felt it was superseded by stringstream, which better encapsulates memory management. strstream is still an official part of the standard that conforming C++ implementers must provide." [distilled from Herb Sutter's http://www.gotw.ca/publications/mill19.htm] So you can either use ostringstream or include backward/strstream (found by grep). Note that I haven't checked if the ostrstream now in backward is the same that used to be in the general include directory in previous versions. HTH, Peter On Wednesday 28 September 2005 05:00, Ernest L. Williams Jr. wrote: > Hi, > > I am now using gcc 4.0.1. > > I get the following error: > ==================================================== > error: ‘ostrstream’ was not declared in this scope > =================================================== > > > What header must I use to get ostrstream? > > I tried : #include <sstream> > > I am confused. > Any help or reference is welcomed and appreciated. > > > > Thanks, > Ernest L. Williams Jr.