Compilare: user.cpp: In function ‘int get_int()’: user.cpp:15:63: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if ( ++Next >= Buffer ) fread(Buff,Buffer,1,F), Next=0; ^ user.cpp:19:63: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if ( ++Next >= Buffer ) fread(Buff,Buffer,1,F), Next=0; ^ user.cpp: In function ‘long long int get_long()’: user.cpp:28:63: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if ( ++Next >= Buffer ) fread(Buff,Buffer,1,F), Next=0; ^ user.cpp:32:63: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if ( ++Next >= Buffer ) fread(Buff,Buffer,1,F), Next=0; ^ user.cpp: In function ‘int main()’: user.cpp:49:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("carray.in","r",stdin); ^