Is there any difference between fflush(stdin) and getchar()

Answer 1

http://www.cplusplus.com/reference/cstdio/fflush/

http://www.cplusplus.com/reference/cstdio/getchar/

Answer 2

They're completely different! Did you do the lessons?

Answer 3

No. They both clean the buffer input

Answer 4

So do exit function and OS shutdown, and they're still completely different.
Pls read getchar function definition, posted by Ipang . And pls do related lessons.