Design a simple calculator by imitating the function of windows's own calculator. (1) at least the functions of adding, reducing, multiplying, dividing, removing and clearing the integer and decimal number are required at least. (2) other computing functions, please refer to Windows's own calculator, as much as possible

Filename	Size	Update
4-1	0	2017-12-21
4-1\.classpath	301	2017-12-21
4-1\.project	379	2017-12-21
4-1\.settings	0	2017-12-21
4-1\.settings\org.eclipse.jdt.core.prefs	598	2017-12-21
4-1\bin	0	2017-12-28
4-1\bin\Calculator.class	4628	2017-12-28
4-1\bin\java.policy.applet	141	2017-12-27
4-1\src	0	2017-12-27
4-1\src\Calculator.java	4015	2017-12-27
4-2	0	2017-12-27
4-2\.classpath	301	2017-12-27
4-2\.project	379	2017-12-27
4-2\.settings	0	2017-12-27
4-2\.settings\org.eclipse.jdt.core.prefs	598	2017-12-27
4-2\bin	0	2017-12-28
4-2\bin\Htu.class	418	2017-12-28
4-2\bin\MyMouseEvent$1.class	632	2017-12-28
4-2\bin\MyMouseEvent$2.class	632	2017-12-28
4-2\bin\MyMouseEvent.class	3087	2017-12-28
4-2\src	0	2017-12-27
4-2\src\Htu.java	2318	2017-12-27

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