More examples

• Coordinate c1

• Coordinate c3

• Coordinate is a class. It�s like a type, except that you (the programmer) define it.

• c1 and c3 are instances of the class; we call them objects

• c1.x, c1.y, c3.x, c3.y are fields of objects c1 and c3 respectively.

x 3 y 4

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