Re: want to add number to label

[Tim Flechtner <timf trdlnk com>]

gtk_label_new expects a pointer to a character array (char *), but 
simply telling the compiler that nr is a pointer to a character array by 
casting it to char * does not make it a valid array. (i could tell you i 
was a flounder, but trust me, its still not true).  you need to convert 
nr to a character representation of nr's floating point value.  one way 
to do this is by using sprintf.  do a 'man sprintf', but it will look 
something like:

char buf[20];
sprintf(buf, "%f", nr);

-tim

edward hage wrote:
> Hello, I think I have a simple problem but I cannot figure out how to
> get a float on a label. It is designed for a string, like "this is a
> button" but I want to show a float value. 
>
> So my question is how can I turn a float into a suitable format to stick
> to a label?
>
> Example that does not work:
>
> GtkWidget *button;
> float nr;
>
> nr = 3.123;
> button = gtk_label_new ((char *) nr);  ????
>
> Thank you, Edward
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