Compilare: user.cpp: In function ‘int main()’: user.cpp:27:24: 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(root, 0, sizeof(root)); ^ user.cpp:35:47: warning: argument to ‘sizeof’ in ‘void* memset(void*, int, size_t)’ call is the same pointer type ‘nod*’ as the destination; expected ‘nod’ or an explicit length [-Wsizeof-pointer-memaccess] memset(T->next[s[k][j] - 'a'] , 0, sizeof(T)); ^ user.cpp:19:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("subsecvente2.in", "r", stdin); ^ user.cpp:20:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("subsecvente2.out", "w", stdout); ^ user.cpp:21:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d ", &n); ^ user.cpp:23:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s ", s[i]); ^