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[img]http://tiantian911.iteye.com/upload/picture/pic/6933/ef4345e4-2432-3c90-9284-96a887772a10.jpg[/img]第一次切菜的成果。[img]http://tiantian911.iteye.com/upload/picture/pic/6935/6c0859a8-4982-322d-a3c3-078a2...
第一章 简单工程模式` public abstract class Operation { private double _numberA; private double _numberB; public Operation() { super(); } public Operation(double _numberA, dou...