Compilare: user.cpp:11:40: warning: ‘typedef’ was ignored in this declaration [enabled by default] typedef struct nod { long x; nod *urm; }; ^ user.cpp: In function ‘void read()’: user.cpp:45:26: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(filein,"r",stdin); ^ user.cpp:47:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld",&n); ^ user.cpp:57:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld %ld",&i,&j); ^ user.cpp: In function ‘void print()’: user.cpp:121:28: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(fileout,"w",stdout); ^