Showing a group of concentric circles of different colors, click on a circle can be displayed on the top of the circle, click the mouse at any location can be displayed to the screen center of a circle to the point of the circle radius, and the color and radius, right Click to clear the screen, double click to restore the initial state.

concentric circles\MainFrm.cpp
..................\MainFrm.h
..................\ReadMe.txt
..................\res\Toolbar.bmp
..................\...\同心圆.ico
..................\...\同心圆.rc2
..................\...\同心圆Doc.ico
..................\Resource.h
..................\StdAfx.cpp
..................\StdAfx.h
..................\同心圆.aps
..................\同心圆.clw
..................\同心圆.cpp
..................\同心圆.dsp
..................\同心圆.dsw
..................\同心圆.h
..................\同心圆.ncb
..................\同心圆.opt
..................\同心圆.plg
..................\同心圆.rc
..................\同心圆Doc.cpp
..................\同心圆Doc.h
..................\同心圆View.cpp
..................\同心圆View.h
..................\Debug
..................\res
concentric circles

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