Clearing buffer

[dev7060]

[Screenshot 1] The screen is not stopping on cin.get() functions for the user to input something. Maybe automatically taking the "enter key" from the buffer.
[Screenshot 2] On using some functions to clear the buffer (like cin.ignore() and fflush(stdin) ), everything is working as required.

My questions are:
(If I am getting something wrong, please point out)

-Why does cin.get() automatically taking the "enter key" from the buffer (previous inputs)?
- Why do simple implementations of cins not follow this thing?
Like:

cout<<"enter something"; cin>>a;
cout<<"enter something"; cin>>b;
cout<<"enter something"; cin>>c;
 // Here the screen stops everytime

-Are these functions (of clearing buffers) especially designed for such cases? Could you provide an example scenario where we don't need those functions? I mean why would someone want to access the previous buffer data of "enter key".

[weaknessforcats]

I don't see any error checking here. How do you know the cin>> worked?

If it gets an error, the data is left in the buffer and the cin>> quits. The next cin>> sees the error and bails without even trying.


This makes it appear all the cin>> quit working for the rest of the program.

Maybe something like this:

bool GetInt(int* data)
{
    cin >> *data;
    if (cin.good())
    {
      return true;
    }
    else
    {
        cin.clear();
        _flushall();  //Microsoft only
        return false;
    }
}