Re: Problem with cin

[Deepak Joglekar <joglekar@xxxxxxx>]

On Tue, 23 Jan 2001 11:49:17 +0530 (IST)
shubhendu <97co266@xxxxxxxxxxxxxx> wrote:

> hi friend !
> 
> what i am writing is not a solution but discussion on y'r problem 
> 
> yesterday i worked with your problem and  found some things 
> like 
>      ones we give irrelevant value to cin  ( wrong data type )
>      its value goes to (nil) and 
>      it does not let execute any cin coming 
>      after thin cin insted of  cin.clear() 
>      making it back to 0xffffff...
> 
> what could be the reason ? 
> 
> enlighten me ...

This is a standard problem with cin, scanf etc inputs.
You should read a string and then process it if you want your prog should not crash. 

You can handle the string conversions by seperating tokens and then converting it to desired number ( int, float, double etc.) using atoi(), atof() etc.

If you want I can send my routines for number input. It was writen for dos but should work fine by changing getch().

> 
> On Mon, 22 Jan 2001, Ramkumar Iyer wrote:
> 
> > Hi ,
> >       Have a look at the code.
> >  If  I give some invalid value for one integer (like
> > characters) , no values are read into both . Ideally , if
> > reading int1 fails then it should print some message and try
> > reading int2.Am I missing something?
> > 
> > #include <iostream.h>
> > main()
> > {
> >   int int1=0;
> >   int int2=0;
> >   cout << " Enter the int1 val : " << flush;
> >   cin >> int1;
> >   if(!cin)
> >   {
> >    cout  << endl << "Error reading int1" << endl << flush;
> >    cin.clear();
> >   }
> > 
> >   cout << " Enter the int2 val : " << flush;
> >   cin >> int2;
> > 
> >   if(!cin)
> >   {
> >     cout  << endl << "Error reading int2" << endl << flush;
> >     cin.clear();
> >   }
> > 
> >   cout << endl << " " << int1 << " " << int2 << flush;
> > }
> > 
> > 
> > 
> > ---------------------------------------------
> > LIP is all for free speech.  But it was created
> > for a purpose.  Violations of the rules of
> > this list will result in stern action.
> > 
> 
> 
> ---------------------------------------------
> LIP is all for free speech.  But it was created
> for a purpose.  Violations of the rules of
> this list will result in stern action.
> 


-- 
Deepak Joglekar
joglekar@xxxxxxx
----------------
     /\^/\
     (o.o)
--oOo-(_)-oOo--