C#定义基类并重写基类方法计算图形面积和周长的windows界面程序

上传者: u012847695 | 上传时间: 2022-10-09 19:16:26 | 文件大小: 42KB | 文件类型: RAR
1.定义基类Shape,这有求面积的虚方法Mianji();求周长的虚方法Zhouchang()。 2.定义Shape类的派生类三角形Tangle,使用base关键字调用基类构造函数,重写Shape类继承的虚方法:求面积虚方法Mianji(),求周长虚方法Zhouchang()。 3.定义Shape类的派生类圆形Circle,重写Shape类继承的虚方法:求面积虚方法Mianji(),求周长虚方法Zhouchang()。 4.定义Shape类的派生类矩形Rectangle,重写Shape类继承的虚方法:求面积虚方法Mianji(),求周长虚方法Zhouchang()。 5.使用Winform窗体程序进行测试: 点击按钮,根据用户所选择的形状接收用户输入的参数,申明基类引用,通过基类引用接收派生类对象将求出的面积和周长值显示到窗体。

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