Compilare: user.cpp: In function ‘int trie_find(int)’: user.cpp:43:11: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(arb[nod].v[p]==0) if(p==0) p=1; ^ user.cpp: In function ‘int main()’: user.cpp:65:23: warning: suggest parentheses around comparison in operand of ‘^’ [-Wparentheses] if(v[i]^v[poz]>maxx) {maxx=v[i]^v[poz];i1=poz+1;j1=i;} ^ user.cpp:52:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("xormax.in","r",stdin); ^ user.cpp:53:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("xormax.out","w",stdout); ^ user.cpp:55:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:56:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[1]); ^ user.cpp:62:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i]); ^