Re: exception error

From:

"Jim Langston" <tazmaster@rocketmail.com>

Newsgroups:

comp.lang.c++.moderated

Date:

Fri, 26 Oct 2007 02:25:10 CST

Message-ID:

<WG6Ui.53$Ob.6@newsfe02.lga>

<mattia.lipreri@gmail.com> wrote in message
news:1193297368.082223.247250@i13g2000prf.googlegroups.com...

Hello, i've this problem:
I'd like to catch this exception, for example see this code

#include "stdexcept"
float f;
try{
cout << "Insert value:" << endl;
cin >> f;
}catch( runtime_error err){
cout << err.what();
}

what's happen if the user will insert a string instead of a float?
What i've to do if i want to catch this exception?

No exception is thrown. Instead you can check the state of cin which can be
converted to a bool and will be false if there was an error.

float f;
cout << "Insert value:" << endl;
if ( std::cin >> f )
   std::cout << "Value is: " << f << "\n";
else
   std::cout << "Wah! You didn't give me a float! Now I have to reset
cin!" << "\n";

{ Please format your article in 70 columns or so, definitely less than
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