Sidetrack: Standard I/O Streams, Redirects
Standard file streams:
-
stdin … standard input, by default: keyboard
-
stdout … standard output, by default: screen
-
stderr … standard error, by default: screen
-
fprintf(stdout, …) has the same effect as printf(…)
-
fprintf(stderr, …) often used to print error messages
Executing a C program causes main(…) to be invoked
- with
stdin , stdout , stderr already open for use
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