Compilare: user.cpp: In function ‘void inmult(int*, int*)’: user.cpp:24:37: 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] if(b[0]==0) memset(a, 0, sizeof a); ^ user.cpp: In function ‘void extrag(int*, long long unsigned int)’: user.cpp:40:25: 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(v, 0, sizeof v); ^