Compilare: main.cpp: In constructor 'nod::nod()': main.cpp:14:36: warning: passing NULL to non-pointer argument 2 of 'void* memset(void*, int, size_t)' [-Wconversion-null] memset( fii, NULL, sizeof( fii ) ); ^ main.cpp: In function 'int main()': main.cpp:99:29: warning: format '%s' expects argument of type 'char*', but argument 3 has type 'char (*)[21]' [-Wformat=] scanf("%c %s\n",&tip,&line); ^ main.cpp:89:31: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("trie.in","rt",stdin); ^ main.cpp:91:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("trie.out","wt",stdout); ^ main.cpp:99:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%c %s\n",&tip,&line); ^