error: invalid use of incomplete type ‘struct foo::bar’
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example:
// main.cpp
std::stringstream(mystring) >> yours.year;compile:
g++ main.cpp -o run
main.cpp: In function ‘int main()’:
main.cpp:41: error: invalid use of incomplete type ‘struct std::stringstream’
/usr/include/c++/4.4/iosfwd:75: error: declaration of ‘struct std::stringstream’
make: *** [run] Error 1Reason: the header for stringstream was missing. Add the following:
<pre>
#include <sstream>
</pre>