Eroare de compilare: user.cpp: In function ‘void iofile()’: user.cpp:13:17: error: ‘FIN’ was not declared in this scope freopen(FIN,"rt",stdin); ^ user.cpp:14:17: error: ‘FOUT’ was not declared in this scope freopen(FOUT,"wt",stdout); ^ user.cpp:15:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:19:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^