Compilare: user.cpp: In function ‘int get()’: user.cpp:8:59: 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:18:43: note: in expansion of macro ‘nxt’ while(buff[pos]<'0' || buff[pos]>'9') nxt; ^ user.cpp:8:59: 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:21:9: note: in expansion of macro ‘nxt’ nxt; ^ user.cpp: In function ‘int main()’: user.cpp:88:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("proc2.in","r",stdin); ^ user.cpp:89:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("proc2.out","w",stdout); ^