What is the difference between inheritance and composition?

Question

As title says, the meaning of both eludes me.

Answer 1

Inheritance expresses a is-a relationship, while composition expresses a has-a relationship between the two classes.

An example for composition is a polygon. It has a ordered sequence of Points. In C++ terms:

struct Polygon {
  std::vector<Point> points;
};

While an logic_error is a exception:

struct logic_error : public exception {
};

Answer 2

Just google Inheritance vs Composition you'll get alot of results.
Using java as an example

public class Banana extends Fruit{ //<---Inheritance Banana is-a Fruit
    private Peel bananaPeel; //<--Composition banana has a Peel
    public Peel getPeel(){
        return bananaPeel;
    }
}