Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:51:39: error: cannot pass objects of non-trivially-copyable type ‘std::string {aka class std::basic_string<char>}’ through ‘...’ scanf("%d %s", &operation_type, word); ^ user.cpp:51:39: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘std::string {aka std::basic_string<char>}’ [-Wformat=] user.cpp:43:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("trie.in", "r", stdin); ^ user.cpp:44:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("trie.out", "w", stdout); ^ user.cpp:51:40: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %s", &operation_type, word); ^