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Programming Interfaces
Input/Output Processes : Alternate I/O Sources

Alternate I/O Sources

Most of the procedures you have seen so far have used the terminal as the input source and as the output destination.
However, you've probably already thought of situations in which you might want to get data from and send data to locations other than the terminal. For example, you might want to send reports to your printer or an operating system file.
* Understanding input and output
* Changing the output destination
* Changing the input source of a procedure
* Defining additional input/output streams
* Sharing streams among procedures
* Summary of opening and closing streams
* Processes as input and output streams (NT and UNIX only)
* I/O redirection for batch jobs
* Reading the contents of a directory
* Performing code-page conversions
* Converting nonstandard input files