Compilare: main.cpp:17:1: warning: 'typedef' was ignored in this declaration typedef struct trie ^~~~~~~ main.cpp: In function 'void addWord(char*)': main.cpp:39:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < strlen(word); i++) ~~^~~~~~~~~~~~~~ main.cpp: In function 'trie* findWord(char*)': main.cpp:55:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < strlen(word); i++) ~~^~~~~~~~~~~~~~ main.cpp: In function 'int findLCPrefix(char*)': main.cpp:103:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < strlen(word); i++) ~~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:114:32: 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); ^ main.cpp:115:34: 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); ^