Compilare: user.cpp: In function ‘void Read()’: user.cpp:35:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ciclueuler.in","r",stdin); ^ user.cpp: In function ‘void ReadV(int&)’: user.cpp:24:61: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if(++Pos==Size) fread(Buffer, 1, Size, stdin), Pos=0; ^ user.cpp:29:58: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if(++Pos==Size)fread(Buffer,1, Size, stdin),Pos=0; ^