C++ In a Nutshell

Name

istrstream class — Input character array streams

Synopsis

class istrstream: public istream
{
public:
  explicit istrstream(const char* str);
  explicit istrstream(char* str);
  istrstream(const char* str, streamsize n);
  istrstream(char* str, streamsize n);
   
  strstreanbuf* rdbuf(  ) const;
  char* str(  );
};

The istrstream class represents an input string stream. To construct an istrstream, pass a character array (with an optional size). You can then read from the string stream just as you would from any other input stream.

The following are the methods of istrstream:

explicit istrstream (const char* str)explicit istrstream (char* str)

Initializes an input string stream by constructing an internal stream buffer as strstreambuf(str, 0) and passing the address of the stream buffer to the base-class constructor for istream.

explicit istrstream (const char* str, streamsize n)explicit istrstream (char* str, streamsize n)

Initializes an input string stream by constructing an internal stream buffer as strstreambuf(str, n) and passing the address of the stream buffer to the base-class constructor for istream.

strstreambuf* rdbuf ( ) const

Returns a pointer to the internal strstreambuf object.

char* str ( )

Returns the internal string, rdbuf( )->str( ).

See Also

ostrstream class, strstream class, strstreambuf class, istream in <istream> , istringstream in <sstream>