Compilare: main.cpp: In member function 'bool graf::operator<(graf&)': main.cpp:16:10: warning: statement has no effect [-Wunused-value] t>a.t; ~^~~~ main.cpp:17:5: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'void parcurgere()': main.cpp:34:10: warning: variable 'a' set but not used [-Wunused-but-set-variable] graf a; ^ main.cpp: In function 'bool dijkstra(int)': main.cpp:99:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<G[a.nod].size();i++) ~^~~~~~~~~~~~~~~~