In a process, when we want to read the STDIN will use READ($IN) , $IN =...
In a process, when we want to read the STDIN
will use READ($IN) , $IN = “the value stored in IN”. Describe what that means and why we need to do that?. can we use different read calls for pipes, devices, and files? explain it
Homework Answers
$IN is a variable which stores the name of the file for your program. The program when executed, becomes a process and uses the value stored by the variable through user input and works on that file.
We need to do that because the file name is as per the user. We cannot hard-code a file name because the program has to be made generic to run on all files given as input. That's why we need a variable.
Yes. Depends on the language you are programming in. In some languages you can store different file pointers for pipes, devices and files in different variables. In some, you have to close the current file before opening another.
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In a process, when we want to read the STDIN
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