An inherited code instance of a class in Python

Python is simpler and more efficient than C++ inheritance, so let's write a simple Python inheritance example.

#!/usr/bin/python   

#filename: pyclass.py   

  

class Member:   

        def __init__(self, name, age):   

                self.name = name   

                self.age = age   

                print 'Member init:%s' % self.name   

        def tell(self):   

                print 'Name:%s,Age:%d' % (self.name, self.age),   

  

class Student(Member):   

        def __init__(self, name, age, marks):   

                Member.__init__(self, name, age)   

                self.marks = marks   

                print 'Student init:%s' % self.name   

        def tell(self):   

                Member.tell(self)   

                print 'Marks:%d' % self.marks   

  

class Teacher(Member):   

        def __init__(self, name, age, salary):   

                Member.__init__(self, name, age)   

                self.salary = salary   

                print 'Teacher init:%s' % self.name   

        def tell(self):   

                Member.tell(self)   

                print 'Salary:%d' % self.salary   

  

s = Student('Tom', 20, 80)   

t = Teacher('Mrs.Huang', 30, 50000)   

  

members = [s, t]   

for mem in members:   

        mem.tell()  

Operation effect:

[root@localhost hhl]# python pyclass.py    

Member init:Tom   

Student init:Tom   

Member init:Mrs.Huang   

Teacher init:Mrs.Huang   

Name:Tom,Age:20 Marks:80   

Name:Mrs.Huang,Age:30 Salary:50000  

We also write a C++ example with the same effect:

//filename: class.cpp   

#include <string.h>   

#include <iostream>   

using namespace std;   

  

class Member   

{   

public:   

    Member(char *n, int a);   

    void tell();   

private:   

    char name[10];   

    int age;   

};   

  

Member::Member(char *n, int a)   

{   

    memcpy(name, n, sizeof(name));   

    age = a;   

    cout<<"Member init:"<<name<<endl;   

}   

  

void Member::tell()   

{   

    cout<<"Name:"<<name<<","<<"Age:"<<age<<",";   

}   

  

class Student:public Member   

{   

public:   

    Student(char *n, int a, int m);   

    void tell_s();   

private:   

    int marks;   

};   

  

Student::Student(char *n, int a, int m):Member(n, a)   

{   

    marks = m;   

    cout<<"Student init:"<<n<<endl;   

}   

  

void Student::tell_s()   

{   

    Member::tell();   

    cout<<"Marks:"<<marks<<endl;   

}   

  

class Teacher:public Member   

{   

public:   

    Teacher(char *n, int a, int s);   

    void tell_t();   

private:   

    int salary;   

};   

  

Teacher::Teacher(char *n, int a, int s):Member(n, a)   

{   

    salary = s;   

    cout<<"Teacher init:"<<n<<endl;   

}   

  

void Teacher::tell_t()   

{   

    Member::tell();   

    cout<<"Salary:"<<salary<<endl;   

}   

  

int main(void)   

{   

    Student s("Tom", 20, 80);   

    Teacher t("Mrs.Huang", 30, 50000);   

       

    s.tell_s();   

    t.tell_t();   

  

    return 0;   

}  

Operation effect:

[root@localhost hhl]# ./class    

Member init:Tom   

Student init:Tom   

Member init:Mrs.Huang   

Teacher init:Mrs.Huang   

Name:Tom,Age:20,Marks:80   

Name:Mrs.Huang,Age:30,Salary:50000  

The two work the same, but python is more compact...