Compilare: user.cpp: In function ‘int main()’: user.cpp:58:33: warning: pointer to a function used in arithmetic [-Wpointer-arith] if (findFather[Edge[i].x] != findFather[Edge[i].y]) ^ user.cpp:58:58: warning: pointer to a function used in arithmetic [-Wpointer-arith] if (findFather[Edge[i].x] != findFather[Edge[i].y]) ^ user.cpp:35:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("pscnv.in" ,"r", stdin ); ^ user.cpp:36:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("pscnv.out","w", stdout); ^ user.cpp: In function ‘void read(int&)’: user.cpp:25:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%s", String + 1); ^