Re: Cast from gchar* to int?

[German Poo Caaman~o <gpoo ubiobio cl>]

El mar, 24-09-2002 a las 18:13, Martyn Russell escribió:
> William L. Thomson Jr. wrote:
> > Ok, I am still not having any luck, here is some code examples for you all
> >
> > Neither of these work, and both return the exact same result, 0.
> > Now the 0 is not the one that I initialized gint i to, but the value that
> > is returned from passing the const gchar *num to the atoi function.
> >
> > So if I start with gint i = 4, it will still output 0;
> >
> > const gchar *num = gtk_entry_get_text(GTK_ENTRY(contact_num_entry));
> > gint i = 0;
> > i = atoi(num);
> > cout << i << endl;
> [...]
> > Basically what I am trying to do, is I have a entry field that will
> > accept numeric input. I then need to get that value, and increment it by
> > one.
> [...]
> It looks to me like you are using the wrong control.  Perhaps you want a 
> spin button?  This would mean you could guarantee an integer and not a 
> string with other character (not 0-9) AND you can get an int using a gtk 
> function call: see here:
>
> http://developer.gnome.org/doc/API/2.0/gtk/gtkspinbutton.html

another way is to use sscanf.

sscanf (num, "%d", &i);

However, it could be nice have something like an entry mask.

-- 
German Poo Caaman~o
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