Compilare: user.cpp: In function ‘int main()’: user.cpp:11:20: warning: unused variable ‘nr’ [-Wunused-variable] int n,i,v[501],k,nr=0,e,copie,s=0; ^ user.cpp:11:27: warning: unused variable ‘copie’ [-Wunused-variable] int n,i,v[501],k,nr=0,e,copie,s=0; ^ user.cpp:19:9: warning: ‘e’ may be used uninitialized in this function [-Wmaybe-uninitialized] e=e+i+(i+1); ^