Compilare: user.cpp: In function ‘int main()’: user.cpp:46:33: warning: pointer to a function used in arithmetic [-Wpointer-arith] if (findFather[Edge[i].x] != findFather[Edge[i].y]) ^ user.cpp:46:58: warning: pointer to a function used in arithmetic [-Wpointer-arith] if (findFather[Edge[i].x] != findFather[Edge[i].y]) ^ user.cpp:30:38: 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:31:38: 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:33:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d", &N, &M); ^ user.cpp:34:37: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d", &start, &finish); ^ user.cpp:37:63: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d %d", &Edge[i].x, &Edge[i].y, &Edge[i].z); ^