Compilare: user.cpp: In function ‘void sterge_muchie(unsigned int, unsigned int)’: user.cpp:24:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ( arc [ y ] [ i ] == x ) ^ user.cpp: In function ‘bool euler(int)’: user.cpp:54:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ( top_node == node) ^ user.cpp:36:27: warning: variable ‘HAS_UNVISITED’ set but not used [-Wunused-but-set-variable] bool FOUND = 0, HAS_UNVISITED ; ^ user.cpp:73:1: warning: control reaches end of non-void function [-Wreturn-type] } ^