Compilare: user.cpp: In member function ‘void parsator<dim>::refresh() [with int dim = 1000000]’: user.cpp:18:4: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(&buf[0], 1, dim, f); } } ^