Compilare: user.cpp: In function ‘int main()’: user.cpp:76:32: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[30]’ [-Wformat=] while (scanf("%d%s",&tip,&s)!=-1) ^ user.cpp:73:9: warning: unused variable ‘i’ [-Wunused-variable] int i,j; ^ user.cpp:73:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j; ^ user.cpp:74:33: 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:75:35: 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); ^