Anyone can explain to me what mean for fflush(stdin) and when nid to use it

[anyone94]

When we nid to use fflush(stdin) n why we nid to use it?

[kbw]

You don't need to use it.

[anyone94]

.......when and why we nid to use fflush(stdin) in c ++?

[JLBorges]

> When we nid to use fflush(stdin) n why we nid to use it?

It is not a question of need. Even if you need it, you can't use it.

fflush(stdin) results ion undefined behaviour.

fflush() can only be used on output streams, or input/output streams on which the most recent operation was not an input operation.