Compilare: user.cpp: In function ‘long int prim(long int)’: user.cpp:40:10: warning: unused variable ‘n’ [-Wunused-variable] long n; ^ user.cpp: In function ‘int main()’: user.cpp:54:13: warning: unused variable ‘N’ [-Wunused-variable] long k, N, x[100]; ^ user.cpp:54:16: warning: unused variable ‘x’ [-Wunused-variable] long k, N, x[100]; ^ user.cpp: In function ‘int sedivide(long int, long int)’: user.cpp:29:10: warning: ‘x[0]’ may be used uninitialized in this function [-Wmaybe-uninitialized] long x[100]; ^