How do I update Labels in GTK+-3.0 in C

Question

I can\'t seem to be able to use the function

gtk_label_set_text();

this is what I write:

#include 

int main(         


        

Answer 1

As per the [ prototype ] , gtk_label_set_text expects GtkLabel* as its first parameter, so change

gtk_label_set_text(label, "I cannot use this func");

to

gtk_label_set_text((GtkLabel*)label, "I cannot use this func");

or more conveniently

gtk_label_set_text(GTK_LABEL(label), "I cannot use this func");

In fact GTK_LABEL() macro expands to :

#define GTK_LABEL(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTK_TYPE_LABEL, GtkLabel))

in the header gtklabel.h.