Compilare: user.cpp: In function ‘int get()’: user.cpp:9:59: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] #define nxt if(++pos==maxb) fread(buff,1,maxb,stdin),pos=0; ^ user.cpp:19:43: note: in expansion of macro ‘nxt’ while(buff[pos]<'0' || buff[pos]>'9') nxt; ^ user.cpp:9:59: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] #define nxt if(++pos==maxb) fread(buff,1,maxb,stdin),pos=0; ^ user.cpp:22:9: note: in expansion of macro ‘nxt’ nxt; ^ user.cpp: In function ‘int main()’: user.cpp:98:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("arborest.in","r",stdin); ^ user.cpp:99:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("arborest.out","w",stdout); ^