Compilare: user.cpp:26:28: warning: multi-character character constant [-Wmultichar] os << 0 << '<n'; ^ user.cpp: In function ‘int main()’: user.cpp:42:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int j = 0; j < diviz.size(); ++j ) ^ user.cpp:43:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int k = 0; k < diviz.size() && diviz[k] < 10 ; ++k ) ^ user.cpp:53:9: warning: unused variable ‘Sum’ [-Wunused-variable] int Sum(0); ^