Chapter 2 examples

chapter_02/examples/collect.cc

chapter_02/examples/complex_number_class.cc

chapter_02/examples/desig2.cc

chapter_02/examples/geometry/CMakeLists.txt

chapter_02/examples/geometry/Circle.cc

chapter_02/examples/geometry/Circle.hh

chapter_02/examples/geometry/Point.cc

chapter_02/examples/geometry/Point.hh

chapter_02/examples/geometry/Polygon.hh

chapter_02/examples/geometry/Shape.hh

chapter_02/examples/geometry/Triangle.cc

chapter_02/examples/geometry/Triangle.hh

chapter_02/examples/geometry/main.cc

chapter_02/examples/literals.cc

chapter_02/examples/onexcept.cc

chapter_02/examples/op_overload.cc

chapter_02/examples/trivialclassoverload.cc

chapter_02/examples/verbose_ctordtor.cc