Eroare de compilare: user.cpp: In constructor ‘nod_trie::nod_trie()’: user.cpp:21: error: ‘memset’ was not declared in this scope user.cpp: In function ‘void add(const char*)’: user.cpp:29: error: ‘strlen’ was not declared in this scope user.cpp: In function ‘void remove2(const char*)’: user.cpp:62: error: ‘strlen’ was not declared in this scope user.cpp: In function ‘int nr_op(const char*)’: user.cpp:77: error: ‘strlen’ was not declared in this scope user.cpp: In function ‘int prefix(const char*)’: user.cpp:87: error: ‘strlen’ was not declared in this scope user.cpp: In function ‘int main()’: user.cpp:112: warning: format ‘%s’ expects type ‘char*’, but argument 3 has type ‘char (*)[22]’ user.cpp:104: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:105: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result