Compilare: user.cpp: In function ‘int main()’: user.cpp:22:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] { freopen("sortaret.out","w",stdout); ^ user.cpp:23:35: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff,1,buffs,stdin),pos=0; ^ user.cpp: In function ‘void read(int&)’: user.cpp:14:89: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] while(buff[pos]<'0'||buff[pos]>'9') if(++pos==buffs) fread(buff,1,buffs,stdin),pos=0; ^ user.cpp:18:57: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if(++pos==buffs) fread(buff,1,buffs,stdin),pos=0; ^