school.h

此文件可以能帮你求体积

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

#if !defined(AFX_SCHOOL_H__E07F2D9F_D5E5_49CD_A88D_69B4901EC4C0__INCLUDED_)
#define AFX_SCHOOL_H__E07F2D9F_D5E5_49CD_A88D_69B4901EC4C0__INCLUDED_

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

// --------------------------------------------------------------------------
// class DataRect
class DataRec
{
public:
	DataRec();
	DataRec( char* n, char* st, char* cty, char* sta, char* zp );
	virtual ~DataRec();

public:
	virtual void Print();

protected:
	char* StrSave( char* s );

private:
	char* name;
	char* streetAddress;
	char* city;
	char* state;
	char* zip;
};

// --------------------------------------------------------------------------
// class Student 
class Student : virtual public DataRec
{
public:
	Student( char* n, char* st, char* cty, char* sta, char* zp, char* m, int id, int lv )
		: DataRec( n, st, cty, sta, zp ), 
		idNumber(id), major(StrSave(m)), level(lv) {}
	Student( char* m, int id, int lv )
		: idNumber(id), major(StrSave(m)), level(lv) {}
	~Student() { delete major; }

public:
	void Print();

protected:
	void Disp();

private:
	char* major;
	int idNumber;
	int level;
};

// --------------------------------------------------------------------------
// class Staff
class Staff : virtual public DataRec
{
public:
	Staff( char* n, char* st, char* cty, char* sta, char* zp, char* dp, float hrwg )
		: DataRec( n, st, cty, sta, zp ), dept( StrSave(dp) ), hourlyWage(hrwg) {}
	Staff( char* dp, float hrwg ) 
		: dept( StrSave(dp) ), hourlyWage(hrwg) {}
	~Staff() { delete dept; }

public:
	void Print();

protected:
	void Disp();

private:
	char* dept;
	float hourlyWage;
};

// --------------------------------------------------------------------------
// class Professor
class Professor : public Staff
{
public:
	Professor( char* n, char* st, char* cty, char* sta, char* zp, char* dp, float sal )
		: DataRec( n, st, cty, sta, zp ), Staff( dp, 0 ), salary( sal ) {}

public:
	void Print();

private:
	float salary;
};

// --------------------------------------------------------------------------
// class StudentStaff 
class StudentStaff : public Student, public Staff
{
public:
	StudentStaff( char* n, char* st, char* cty, char* sta, char* zp, char* m, int id, int lv, char* dp, float hrwg )
		: DataRec( n, st, cty, sta, zp ), Student( m, id, lv ), Staff( dp, hrwg ) {}

public:
	void Print();
};

#endif // !defined(AFX_SCHOOL_H__E07F2D9F_D5E5_49CD_A88D_69B4901EC4C0__INCLUDED_)