| 摘要 |
PURPOSE:To use efficiently a file with an extremely simple procedure without leaving an invalid file part in a file medium, by writing the next file at the file end position corresponding to the end position information stored in a memory means. CONSTITUTION:A file writing start means 1 is started an extension mode prior to a file writing action then starts a record control means 3 for end position of valid file. Then the means 3 recognizes the information on the end position recorded to a recording device 4 and informs it to the means 1. Thus the means 1 decides the file writing start position and the file contents are successively written to a file medium 5 from said writing start position for each unit designated by a user. Such a series of writing actions are carried out via a file writing control means 2. When all file contents are written, the means 2 receives a valid file end indication from the user and starts the means 3.
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