error: variable ‘std::stringstream ss’ has initializer but incomplete type

[HändyÄndy]

Folgenden Code habe ich aus dem Netz kopiert und in mein Programm eingefügt:

#include <strstream>
...
int DataExtractor::str2int(const string &str) {
	stringstream ss(str);
	int num = -1;
	if((ss >> num).fail())
		cout << "Error parsing " << str << " to int " << endl;
	return num;
}

Wenn ich das kompiliere, dann erhalte ich folgenden Fehler:

g++ -g -Wall -c DataExtractor.cpp -o DataExtractor.o
In file included from /usr/include/c++/4.0.0/backward/strstream:51,
from DataExtractor.cpp:5:
/usr/include/c++/4.0.0/backward/backward_warning.h:32:2: warning: #warning This file includes at least one deprecated or antiquated header. Please consider using one of the 32 headers found in section 17.4.1.2 of the C++ standard. Examples include substituting the <X> header for the <X.h> header for C++ includes, or <iostream> instead of the deprecated header <iostream.h>. To disable this warning use -Wno-deprecated.
DataExtractor.cpp: In member function ‘int DataExtractor::str2int(const std::string&)’:
DataExtractor.cpp:27: error: variable ‘std::stringstream ss’ has initializer but incomplete type
make: *** [DataExtractor.o] Error 1

Das versteh ich leider nicht

[Janjan]

Stringstream ist in sstream definiert.

[HändyÄndy]

Danke, danke...