Compilare: user.cpp: In function ‘void descomp(long long int, long long int*)’: user.cpp:11:22: warning: argument to ‘sizeof’ in ‘void* memset(void*, int, size_t)’ call is the same expression as the destination; did you mean to dereference it? [-Wsizeof-pointer-memaccess] memset(C,0,sizeof(C)); ^