文件名称:main
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设计一个类CRectangle，有5个数据成员（私有属性），分别为矩形左上顶点的横坐标、纵坐标和矩形的长、宽及矩形面积。该类还要求有5个成员函数（公有属性）和1个友元函数：矩形移动位置的move（）函数，改变矩形大小的size（）函数，显示输出数据成员的show（）函数，构造函数和析构函数，友元函数是求矩形面积的area（），要求构造函数按形参（有默认参数值）初始化对象。并编写main函数测试该类各功能（至少定义2个对象）。
1、main函数中定义该类的对象，再调用各成员函数和友元函数。
2、所有成员函数和友元的执行都要有相应的执行信息输出，例如，析构函数被调用
时应输出“类CRectangle的析构函数被执行！”。
3、生成的程序执行结果，应包括各成员函数执行时的输出信息。
-The design of a kind of CRectangle, a 5 data members ( private property ), are respectively rectangular left vertex abscissa ordinate rectangular, and the length, width and rectangular area. The class also has 5 member function ( public property ) and 1 friend function: rectangular moving position of the move ( ) function, alter the rectangle size size ( ) function, display the output data member of the show ( ) function, a constructor and destructor, friend function for rectangular area is area ( ), require the constructor according to the parameter ( default parameter values ) to initialize the object. And the prepared main function test the class each function ( define at least 2 object).
In 1, main function defined in the class object, and then call the member functions and friends functions.
In 2, all the member functions and friends executive should have corresponding execution information output, for example, the destructor is called
When should output "CRectangle destr
1、main函数中定义该类的对象，再调用各成员函数和友元函数。
2、所有成员函数和友元的执行都要有相应的执行信息输出，例如，析构函数被调用
时应输出“类CRectangle的析构函数被执行！”。
3、生成的程序执行结果，应包括各成员函数执行时的输出信息。
-The design of a kind of CRectangle, a 5 data members ( private property ), are respectively rectangular left vertex abscissa ordinate rectangular, and the length, width and rectangular area. The class also has 5 member function ( public property ) and 1 friend function: rectangular moving position of the move ( ) function, alter the rectangle size size ( ) function, display the output data member of the show ( ) function, a constructor and destructor, friend function for rectangular area is area ( ), require the constructor according to the parameter ( default parameter values ) to initialize the object. And the prepared main function test the class each function ( define at least 2 object).
In 1, main function defined in the class object, and then call the member functions and friends functions.
In 2, all the member functions and friends executive should have corresponding execution information output, for example, the destructor is called
When should output "CRectangle destr
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main.cpp