Compilare: user.cpp: In member function ‘int Trie::del(int)’: user.cpp:105:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘void citire()’: user.cpp:154:30: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[25]’ [-Wformat=] scanf("%d %s\n", &caz, &sir); ^ user.cpp:154:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %s\n", &caz, &sir); ^ user.cpp: In function ‘int main()’: user.cpp:170:32: 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:171:34: 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); ^