Compilare: user.cpp: In constructor ‘trie::trie()’: user.cpp:16:50: warning: passing NULL to non-pointer argument 2 of ‘void* memset(void*, int, size_t)’ [-Wconversion-null] memset(this -> son, NULL, sizeof(this -> son)); ^ user.cpp: In function ‘char getChar(FILE*)’: user.cpp:27:32: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, Dragoste, f); ^ user.cpp: In function ‘int main()’: user.cpp:93:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("algsort.out", "w", stdout); ^