Compilare: user.cpp: In function ‘long double Dist(int, int)’: user.cpp:32:9: warning: variable ‘imin’ set but not used [-Wunused-but-set-variable] int imin; ^ user.cpp: In function ‘void prim()’: user.cpp:52:15: warning: unused variable ‘start’ [-Wunused-variable] int Min,u,start,weight; ^ user.cpp:68:28: warning: ‘u’ may be used uninitialized in this function [-Wmaybe-uninitialized] weight=Dist(u,j); ^