Can I use a class as a member of an other class? Does it make sense?

Question

In C, when I had a " struct point{ int x; int y; }; " structure, it was a good practice when I made a triangle using the 'point':
struct triangle{ struct point A; struct point B; struct point C; };

But in C++ classes may contain functions, unlike struct.
So, does it make sense if I do the same with classes, or should I use struct?
What if 'class Point' has a member function?
Which is the preferred way?
Do I have to inherit a class instead of nesting into another class?

Answer 1

Yes we can do that.
For more info go to
http://stackoverflow.com/questions/10576334/a-class-as-data-member-of-another-class
this will help someway :)