Okay, so I'm sure if flushing the input buffer is what I want, or if that even makes sense, so I'll say what I'm trying to do first to see if that's what I want.
So, I made this program where you specify the number of digits in a number you want to remember. Then, it ask you how many questions.
Anyways, a number will show up. Then, you have 4 seconds to remember. Then, 30 lines are skipped as my "clearing of the screen". Sleep another second.
You are then asked to type in the number you saw.
The problem I have is that the user can just type in the number while they see it, and what the typed will show up when the prompt comes up.
What I want to do is "flush the input buffer" just before I request for input so the user can no longer type in the number while they see it.

-Michael P.

"Michael P." <baseball.mjp@gmail.com> wrote in message news:gdd02h$1uui$1@digitalmars.com...
> Okay, so I'm sure if flushing the input buffer is what I want, or if that
> even makes sense, so I'll say what I'm trying to do first to see if that's
> what I want.
> So, I made this program where you specify the number of digits in a number
> you want to remember. Then, it ask you how many questions.
> Anyways, a number will show up. Then, you have 4 seconds to remember.
> Then, 30 lines are skipped as my "clearing of the screen". Sleep another
> second.
> You are then asked to type in the number you saw.
> The problem I have is that the user can just type in the number while they
> see it, and what the typed will show up when the prompt comes up.
> What I want to do is "flush the input buffer" just before I request for
> input so the user can no longer type in the number while they see it.
>
> -Michael P.

I'm not sure what lib or function you're using to read the input, but there should be some way to do an asynchronous read from the input buffer to read input *only* if input already exists and just sinply return nothing instead of waiting if no input exists. Then you could do something like this:

do
{
    inputDataToThrowAway = AsyncRead();
} while(data was actualy read);
output("Please enter your answer");
waitForInputAndReadIt();

Nick Sabalausky Wrote:

> "Michael P." <baseball.mjp@gmail.com> wrote in message news:gdd02h$1uui$1@digitalmars.com...
> > Okay, so I'm sure if flushing the input buffer is what I want, or if that
> > even makes sense, so I'll say what I'm trying to do first to see if that's
> > what I want.
> > So, I made this program where you specify the number of digits in a number
> > you want to remember. Then, it ask you how many questions.
> > Anyways, a number will show up. Then, you have 4 seconds to remember.
> > Then, 30 lines are skipped as my "clearing of the screen". Sleep another
> > second.
> > You are then asked to type in the number you saw.
> > The problem I have is that the user can just type in the number while they
> > see it, and what the typed will show up when the prompt comes up.
> > What I want to do is "flush the input buffer" just before I request for
> > input so the user can no longer type in the number while they see it.
> >
> > -Michael P.
> 
> I'm not sure what lib or function you're using to read the input, but there should be some way to do an asynchronous read from the input buffer to read input *only* if input already exists and just sinply return nothing instead of waiting if no input exists. Then you could do something like this:
> 
> do
> {
>     inputDataToThrowAway = AsyncRead();
> } while(data was actualy read);
> output("Please enter your answer");
> waitForInputAndReadIt();
> 
> 

Oh yeah, forgot to say that I am using din.readf() for input.

"Michael P." <baseball.mjp@gmail.com> wrote in message news:gddeog$26je$1@digitalmars.com...
> Nick Sabalausky Wrote:
>
>> "Michael P." <baseball.mjp@gmail.com> wrote in message news:gdd02h$1uui$1@digitalmars.com...
>> > Okay, so I'm sure if flushing the input buffer is what I want, or if
>> > that
>> > even makes sense, so I'll say what I'm trying to do first to see if
>> > that's
>> > what I want.
>> > So, I made this program where you specify the number of digits in a
>> > number
>> > you want to remember. Then, it ask you how many questions.
>> > Anyways, a number will show up. Then, you have 4 seconds to remember.
>> > Then, 30 lines are skipped as my "clearing of the screen". Sleep
>> > another
>> > second.
>> > You are then asked to type in the number you saw.
>> > The problem I have is that the user can just type in the number while
>> > they
>> > see it, and what the typed will show up when the prompt comes up.
>> > What I want to do is "flush the input buffer" just before I request for
>> > input so the user can no longer type in the number while they see it.
>> >
>> > -Michael P.
>>
>> I'm not sure what lib or function you're using to read the input, but
>> there
>> should be some way to do an asynchronous read from the input buffer to
>> read
>> input *only* if input already exists and just sinply return nothing
>> instead
>> of waiting if no input exists. Then you could do something like this:
>>
>> do
>> {
>>     inputDataToThrowAway = AsyncRead();
>> } while(data was actualy read);
>> output("Please enter your answer");
>> waitForInputAndReadIt();
>>
>>
>
> Oh yeah, forgot to say that I am using din.readf() for input.

Ok, I took a look at the phobos documentation for that. Looks like this should work (I use Tango instead of phobos, so I haven't tested it. Hopefully it'll work):

void clearInputBuffer()
{
    while(din.available() > 0)
    {
        din.getc();
    }
}

Calling that function before you read the user's input *should* do what you're looking for.

Nick Sabalausky Wrote:

> "Michael P." <baseball.mjp@gmail.com> wrote in message news:gddeog$26je$1@digitalmars.com...
> > Nick Sabalausky Wrote:
> >
> >> "Michael P." <baseball.mjp@gmail.com> wrote in message news:gdd02h$1uui$1@digitalmars.com...
> >> > Okay, so I'm sure if flushing the input buffer is what I want, or if
> >> > that
> >> > even makes sense, so I'll say what I'm trying to do first to see if
> >> > that's
> >> > what I want.
> >> > So, I made this program where you specify the number of digits in a
> >> > number
> >> > you want to remember. Then, it ask you how many questions.
> >> > Anyways, a number will show up. Then, you have 4 seconds to remember.
> >> > Then, 30 lines are skipped as my "clearing of the screen". Sleep
> >> > another
> >> > second.
> >> > You are then asked to type in the number you saw.
> >> > The problem I have is that the user can just type in the number while
> >> > they
> >> > see it, and what the typed will show up when the prompt comes up.
> >> > What I want to do is "flush the input buffer" just before I request for
> >> > input so the user can no longer type in the number while they see it.
> >> >
> >> > -Michael P.
> >>
> >> I'm not sure what lib or function you're using to read the input, but
> >> there
> >> should be some way to do an asynchronous read from the input buffer to
> >> read
> >> input *only* if input already exists and just sinply return nothing
> >> instead
> >> of waiting if no input exists. Then you could do something like this:
> >>
> >> do
> >> {
> >>     inputDataToThrowAway = AsyncRead();
> >> } while(data was actualy read);
> >> output("Please enter your answer");
> >> waitForInputAndReadIt();
> >>
> >>
> >
> > Oh yeah, forgot to say that I am using din.readf() for input.
> 
> Ok, I took a look at the phobos documentation for that. Looks like this should work (I use Tango instead of phobos, so I haven't tested it. Hopefully it'll work):
> 
> void clearInputBuffer()
> {
>     while(din.available() > 0)
>     {
>         din.getc();
>     }
> }
> 
> Calling that function before you read the user's input *should* do what you're looking for.
> 
> 

No, unfortunately that didn't work.
I tried calling din.flush() before the input too and it didn't work either.