class calling function that is declared outside main()/class

[nelsonyap48]

Is it possible for a class to call a function that is declared outside the main() or from another class without inheriting the class.

eg.

class animal{
.....
void insect()
};

class birds{
.....
void feather()
};

void find()

main()
{
....
}

Can insect() call find()? If so, how is it done?
Can insect() call feather() without inheriting birds? If so, how is it done?

Thanks in advance!

[hamsterman]

You can call find() from any function, as long as find() is declared before the definition of the calling function.
To call feather() from insect() you either need to have a birds object (my_birds.feather();) or to inherit birds. Another option is to make feather a static function. Then you'll be able to call it almost like a normal function but it won't be able to access non-static members of the class ('almost' means that you have to note the scope: birds::feather();)