C++实验6 继承与派生（一）

实验名称：实验6 继承与派生（一）
所使用的开发工具及环境：PC机一套 Visual Studio 2010

实验要求：

1.硬件基本配置：Intel PentiumIII以上级别的CPU，大于64MB的内存。
2.软件要求：Window 2000操作系统，Visual Studio 6.0或更高版本开发环 境。
3.实验学时：2学时
4.实现实验内容中的题目。
5.写实验报告

实验目的：

理解继承与派生、单继承与多继承的概念；
理解基类与派生类的定义及使用方法，派生类对象的定义与初始化方法；
理解继承与派生过程中，把派生类作为基类构成类族的概念及虚基类的概念。

实验内容：

1、由在校人员类(Person)作为基类派生出学生类(Student)：

#include<iostream>
#include<string>
using namespace std;
class Person{
public:
      Person();
	  Person(int i, string n, char s, int a){id = i; name = n; sex = s; age = a;}
	  int getID(){return id;}
	  void show()
{ cout<<"id :"<<id<<"\nname : "<< name <<"\nsex : "<<sex<<"\nage : "<<age<<endl;}
private:
	int id;
	string name;
char sex;
	int age;
};

class Student:public Person{
public:
	Student();
	Student(int i, string n, char s, int a, float m, float p, float e, float c ):Person(i,n,s,a)
	{math = m; physical = p; english = e; cpp = c;total = m + p + e + c;  }
	void show(){
		cout<<"math : "<<math<<"\nphysical : "<< physical <<"\nenglish : "<<english<<"\ncpp : "<<cpp<<"\ntotal : "<<total<<endl;
	}
	/*void show_person(){
	    cout<<endl<<"Class Person is : "<<endl;
		person.show();
	}*/
private:
	//Person person;
	float math;
	float physical;
	float english;
	float cpp;
	float total;
};

	int main(){
	Person p1(1,"张三",'M',18);
    p1.show();
	cout<<endl;
	Student s1(2,"王五",'W',28,100,90,80,70);
	p1.show();
	s1.show();
	return 0;
}

2、由学生类、课程类作为基类，共同派生出选课类。

#include<iostream>
#include<string>
using namespace std;
class Student{
public:
	Student(){}
	Student(int i, string n, char s, int a){no = i; name = n; sex = s; age = a; }
	void show(){cout<<"no : "<<no<<"\nname : "<<name<<"\nsex : "<<sex<<"\nage : "<<age<<endl;}
private:
	int no;
	string name;
	char sex;
	int age;
};

class Lesson{
public:
	Lesson();
	Lesson(int no,string name,int hour)
	{cno = no; cname = name; chour = hour;}
	void show()
	{cout<<"cno : "<<cno<<"\ncname : "<<cname<<"\nchour : "<<chour<<endl;}
private:
	int cno;
	string cname;
	int chour;
};
Lesson::Lesson(){}
class SL:public Student,public Lesson{
public:
	SL(){}
	SL(int i, string n, char s, int a, int no, string nm, int hour, int score ):lesson(no,nm,hour),student(i,n,s,a)
	{this->score = score;}
	void show(){
        student.show();
		lesson.show();
		cout<<"score : "<<score<<endl;}
/*	void show_Student(){
	student.show();
	}
	void show_Lesson(){
	lesson.show();
	}*/

private:
	Student student;
	Lesson lesson;
	int score;
};

int main(){
	SL s1(1,"LaicZhang",'M',19,2,"c++",64,100);
	s1.show();
}

结果截图

3、由二维坐标点类Point作为基类派生出圆类Circle；再由圆类Circle作为基类派生出圆柱体类Cylinder。

#include<iostream>
using namespace std;

class Point{
	public:
		Point(int xx = 0, int yy = 0){
		x = xx;
		y = yy; 
		} 
		int getX(){
			return x;
		}
		int getY(){
			return y;
		}
		void show(){
		cout<<"("<<x<<","<<y<<")"<<endl; 
		}
	private:
		int x;
		int y;
};

class Circle:public Point{
	public:
		Circle(int xx = 0, int yy = 0,float r =1):point(xx,yy){
			radius = r;
		}
		double getR(){
			return radius;
		}
		void show(){
			cout<<"圆心坐标：";
			point.show();
			cout<<"圆半径："<<radius<<endl;
		}
	private:
		Point point;
		float radius;
};

class Cylinder:public Circle{
	public:
		Cylinder(int xx = 0, int yy = 0, float r = 1, float h = 2):circle(xx,yy,r){
		height = h; 
		}
		float getH(){
			return height;
		}
		void show(){
		circle.show();
		cout<<"圆柱体高度："<<height<<endl;
		}
	private:
	  Circle circle; 
	  float height; 
};
int main(){
	Point p1(5,5);
    p1.show();
    cout<<endl;
    Circle c1(7,8,9);
    c1.show();
    cout<<endl;
    Cylinder cy1;
    cy1.show();
	return 0;
}

结果截图

结果与分析 ( 收获、问题 )

理解继承与派生、单继承与多继承的概念；
理解基类与派生类的定义及使用方法，
派生类对象的定义与初始化方法；
理解继承与派生过程中，把派生类作为基类构成类族的概念及虚基类的概念。