How to simulate an EOF?

c eof getchar kernighan-and-ritchie

To enter an EOF, use:

^Z (CtrlZ) in Windows
^D on Unix-like systems

c eof getchar kernighan-and-ritchie

Refer EOF

Windows: Ctrl+ZUnix :Ctrl+D

c eof getchar kernighan-and-ritchie

First, press: Ctrl^X, next: Ctrl^D