myclass.h

此文件可以能帮你求体积

// MyClass.h: interface for the MyClass class.
//
//////////////////////////////////////////////////////////////////////

#if !defined(AFX_MYCLASS_H__A1D3EE5B_3973_407F_97B3_955D0AAD3B0D__INCLUDED_)
#define AFX_MYCLASS_H__A1D3EE5B_3973_407F_97B3_955D0AAD3B0D__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

#define _SONGK_USE_CP_CTOR_ 1

class MyClass  
{
	friend int GetVal( MyClass obj );

public:
	MyClass( int i );
	virtual ~MyClass();

#if _SONGK_USE_CP_CTOR_
	MyClass( const MyClass& obj );
#endif

private:
	int *p;
};

#endif // !defined(AFX_MYCLASS_H__A1D3EE5B_3973_407F_97B3_955D0AAD3B0D__INCLUDED_)