The book you are reading is crap. Avoid the book and tell others to do the same.
<conio.h>
is a system-specific header and not guaranteed to be available on many platforms.- The result of
fgetc
must never be stored in achar
variable. - The function
feof
must never be used in a loop condition.
The book probably comes from the 1980s or early 1990s. There is a function delay
in Turbo Pascal that takes milliseconds. Maybe that’s the one the author means.
solved What is delay() in C? Is it a system function?