| 1. | File identifiers are implementation - dependent single - cell values that are passed to file operators to designate specific files . opening a file assigns a file identifier , which remains valid until closed 档案识别号码是实作相依单一单元值,它被传给档案操作者来指派特别的档案.打开一个档案时会分配一个档案识别号码,它的值在关闭之前会保持正确 |