Compilare: user.cpp: In function ‘void upd(Trie*, char*, int)’: user.cpp:49:43: warning: suggest parentheses around comparison in operand of ‘^’ [-Wparentheses] if(i==n && ((T->fii[c]->nr)^((1<<i)-1)==0)) ^ user.cpp: In function ‘int main()’: user.cpp:60:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("subsecvente2.in","r",stdin); ^ user.cpp:61:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("subsecvente2.out","w",stdout); ^ user.cpp:63:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n",&n); ^ user.cpp:69:16: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(s); ^ /tmp/cc0CByc8.o: In function `main': user.cpp:(.text.startup+0xb0): warning: the `gets' function is dangerous and should not be used.