Compilare: user.cpp: In function ‘int main()’: user.cpp:34:27: 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:37:29: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[50003]’ [-Wformat=] scanf ("%s\n", &a[i]); ^ user.cpp:45:65: 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[ a[i][j] - 'a' ], 0, sizeof(T)); ^ user.cpp:29:44: 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:30:46: 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:31:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d\n", &n); ^ user.cpp:37:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%s\n", &a[i]); ^