Compilare: user.cpp: In member function ‘graf graf::operator+(graf)’: user.cpp:78:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Nod.size();i++) A.Nod.push_back(Nod[i]); ^ user.cpp:79:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<B.Nod.size();i++) A.Nod.push_back(B.Nod[i]); ^ user.cpp: In function ‘graf Evaluate(graf)’: user.cpp:132:15: warning: unused variable ‘Sum’ [-Wunused-variable] int Max=0,Sum=0; ^ user.cpp: In member function ‘int graf::dens()’: user.cpp:45:5: warning: control reaches end of non-void function [-Wreturn-type] } ^