[C + +] C + + class basic syntax

This test code includes the following:

(1) How to use the constructor function;
(2) default constructor;
(3) Assigning values between objects;
(4) const use syntax;
(5) Defining a Class constant: One method is to use an enum, and the other is to use static.

#include <iostream>using namespacestd;enumsextype{man, WOMAN};classhuman{//The default is private    Private:        stringname;        Sextype sex; intAge ; //(5) Defining a Class constant: One method is to use an enum, and the other is to use the static        enum{len=1}; Static Const intLEN2 =3;  Public:       //If no constructors are provided in the class definition, the compiler provides a default constructor.       However, if a constructor is defined in a class, the writer must provide a default constructor at the same time. //There are two ways of providing a default constructor://(1) Define a constructor with no parameters: Human (); //(2) Provide default values for parameters of non-default constructors: Human (String m_name= "No Name", int m_age=0, Sextype m_sex=man); //two ways to define it can only two select oneHuman (); Human (stringM_name,intm_age, Sextype m_sex); Human (intm_age); ~Human (); //The method defined in the class declaration is inline. You can also use the inline keyword to define a function outside the class declaration.        voidShow ()Const  //a const appended to the function name indicates that the function does not modify the data members of the class. {cout<<" This is"<<name<<", Sex:"<<sex<<", "<<age<<"years old."<<Endl; }}; Human::human () {cout<<"default construct function"<<Endl;} Human::human (stringM_name,intm_age, Sextype m_sex) {cout<<"construct function:"<<m_name<<Endl; Name=M_name; Age=M_age; Sex=M_sex;} Human::human (intm_age) { Age=M_age;} Human::~Human () {cout<<"Destroy function:"<<name<<Endl;}intMain () {cout<<"This is test code of C + + class:"<<Endl; {        //(1) Use of construct functionHuman Jack = Human ("Jack", -, man);//Show CallHuman Jerry ("Jerry", -, man);//Implicit invocationHuman *ptom =NewHuman ("Tom",Ten, man);//New Call//You can assign a value directly with an assignment statement when the constructor has only one argument. Constructors with only one argument will be automatically calledHuman marry = One;//Assignment Invocation//(2) Defaults construct functionHuman Lucy; //(3) Assignment ObjectHuman James; James= Human ("James", -, man);//Create a temporary object james,copy a portion of the object assigned to the James variable.        The temporary object is immediately destroyed. //(4) const        ConstHuman Thomas ("Thomas", in, man);  Thomas.show (); //The Show method must define with ' const '    }    return 0;}

The result of the operation is: