a.cpp

铁道出版社出版的C++的习题源代码

#include<iostream.h>
#include<string.h>
class Student
{
public:
	Student(int n,char nam[])
	{
		num=n;
		strcpy(name,nam);
	}
	void display()
	{
		cout<<"num:"<<num<<endl<<"name:"<<name<<endl;
	}
protected:
	int num;
	char name[20];
};
class Student1:public Student
{
public:
	Student1(int n,char nam[40],int a):
	Student(n,nam)
	{
		age=a;
	}
	void show()
	{
		display();
		cout<<"age:"<<age<<endl;
	}
private:
	int age;
};
class Student2:public Student1
{
public:
	Student2(int n,char nam[],int a,int s):Student1(n,nam,a)
	{
		score=s;
	}
	void show_all()
	{
		show();
		cout<<"score:"<<score<<endl;
	}
	private:
		int score;
};
int main()
{
	Student2 stud(10010,"fraiy",23,99);
	stud.show_all();
	return 0;
}