l8_9.cpp

《C++程序设计教程》电子教案及例题源码

#include <iostream.h>
#include <String.h>
class CEmployee
{
private:
	char *name;
	int age;
public:
	CEmployee(char *n, int a);
	virtual ~CEmployee(); 
};
CEmployee::CEmployee(char *n, int a)
{
	name=new char[strlen(n)+ 1 ];
	strcpy(name, n);
	age = a;
}
CEmployee::~CEmployee() 
{
	cout << "Destruct CEmployee" << endl;
	if(name) 
	{
		delete []name; 
	} 
}

class CTeacher : public CEmployee 
{
private:
	char *mainCourse;
public:
	CTeacher(char *n, char *course, int a);
	virtual ~CTeacher(); 
};

CTeacher::CTeacher(char *n, char *course, int a) : CEmployee(n,a)
{
	mainCourse = new char[strlen(course)+1];
	strcpy(mainCourse, course);
}

CTeacher::~CTeacher() 
{ 
	cout << "Destruct CTeacher" << endl;
	if(mainCourse)
		delete []mainCourse;
}  

void main(void)
{
	CEmployee *p[3];
	p[0] = new CEmployee("Name1", 20);
	p[1] = new CTeacher("Name2","C for 2 years,C++ 3 years",26);
	p[2] = new CTeacher("Name3","Data structure for 2 years,C++ 3 years",30);
	for(int i=0; i<3; i++)
		delete p[i]; 
}