C++学习杂记

定义的头文件：

class Girl 定义成虚拟基类，这样将禁止生成基类Girl的对象，同时把构造函数：不带参数的构造函数Girl( )   、 带参

 

数的构造函数  Girl( string name , int height , int age, int weight ) 放在了protected作用域，进一步强调禁止在Girl类外创建基于

 

 

基类的对象，当然显式的把复制构造函数放在private域，也是有利无弊的。

class Beauty_girl  :  public Girl { }; 定义了一个Beauty_girl，从基类Girl公有派生而来，添加了四个新增加成员，

 

bool her_mettle ;  //气质

bool her_culture ;  //修养

bool her_kind_heart ; // 善良

bool her_virgin ;   

 

此时基类Girl 的 public成员将隐式作为派生类Beauty_girl 的Public成员（注意，用的是隐式，可以理解为从基类到派生类对应作用域的映

 

射），此时派生类对象可在类外部直接调用公有继承的方法或数据成员。

 

 

同样基类Girl的protected成员将隐式作为派生类Beauty_girl的protected成员（过分强调一个问题，可能略显多余，但我觉得对比犯下隐

 

晦的难以发现的bug，这样还是有必要的 【隐式可以理解为从基类到派生类对应作用域的映射，至少我认为不会是直接的copy，那样是很影

 

响C++类封装的效率的】） 。

 

 

当然基类Girl的private成员将隐式作为派生类Beauty_girl的private成员，这时在类外访问private成员（数据或者方法）必须通过派生类

 

对应的接口（及public方法）来间接调用。

 

#ifndef GIRL_H#define GIRL_H#include<string>#include<iostream>using std::string ;using std::cout;using std::endl;class Girl //virtual base class {private:string her_name ;int her_height ;int her_age ;int her_weight ;Girl( const Girl& );public:virtual ~Girl( )=0 ;void Get_name( )const{ cout<<"Name : "<<her_name<<endl ; }void Get_height( )const{ cout<<"Height : "<<her_height<<endl ; }void Get_age( )const{ cout<<"Age : "<<her_age<<endl ; }void Get_weight( )const{ cout<<"Weight : "<<her_weight<<endl ; }protected :Girl( ) : her_name("Love_Ling"), her_height( 165 ), her_age( 18 ), her_weight(85 ){ cout<<"Default Constructor Called "<<endl; }Girl( string name , int height , int age, int weight ) : her_name(name),her_height(height),her_age(age), her_weight(weight){ cout<<"Explicit Constructor Called "<<endl; }void Get_information( )const;} ;class Beauty_girl : public Girl //Drived class {private:bool her_mettle ; //气质bool her_culture ; //修养bool her_kind_heart ; // 善良bool her_virgin ; Beauty_girl( const Beauty_girl& );public:Beauty_girl( ) : Girl( ), her_mettle( true ), her_culture( true ), her_kind_heart( true ), her_virgin(true){ }Beauty_girl( string name , int height , int age, int weight, bool mettle, bool culture, bool kind_heart ,bool virgin ) : Girl( name, height, age,weight ), her_mettle(mettle), her_culture(culture),her_kind_heart(kind_heart),her_virgin(virgin){ } void Set_mettle( bool yes_or_no ){her_mettle=yes_or_no;}void Set_culture( bool yes_or_no ){her_culture=yes_or_no;}void Set_kind_heart( bool yes_or_no ){her_kind_heart=yes_or_no;}void Set_virgin( bool yes_or_no ){her_virgin=yes_or_no ;}void Get_mettle( )const;void Get_culture( )const ;void Get_kind( )const;void If_virgin( )const;void Get_infor( )const;void Syn_judge( );protected:void Judge( )const;};class Sex_girl : private Beauty_girl{private:int her_bust ; int her_waist ;int her_hip ;Sex_girl(const Sex_girl& );public:Sex_girl( ) : Beauty_girl( ), her_bust( 33 ), her_waist( 22 ), her_hip( 33 ){ }Sex_girl( string name , int height , int age, int weight, bool mettle, bool culture, bool kind_heart ,bool virgin, int bust, int waist, int hip ) : Beauty_girl( name, height, age,weight, mettle, culture, kind_heart, virgin ) , her_bust(bust), her_waist(waist), her_hip(hip ){ }void Set_bust( int bust ){ her_bust=bust; }void Set_waist( int waist ){ her_waist=waist; }void Set_hip( int hip ){ her_hip=hip; }void Get_sex_infor( )const;void Set_sex_chara( bool mettle, bool culture, bool kind_heart, bool virgin ,int bust, int waist, int hip );void Syns_judge( )const ;}; #endif 

 

class Sex_girl 通过私有继承Beauty_girl派生而来，此时基类Beauty_girl的public/protected成员都将作为派生类Sex_girl的

 

私有(private)成员，此时在类外，通过派生类对象直接调用基类public成员是不被允许的。派生类对象可在类外通过派生类public成员方法

 

来间接访问基类的public/protected成员。

 

 

#include"stdafx.h"#include"girl.h"using std::endl;//Girl member function//Girl::~Girl( ){cout<<"Constructor of Girl called ! "<<endl;}void Girl::Get_information( )const{Get_name( );Get_height( );Get_age( );Get_weight( );}//Beauty_girl member function//void Beauty_girl::Get_mettle( )const{if ( her_mettle==true )cout<<"Yes, you are a mettler "<<endl;elsecout<<"Pity , you are a rude giel "<<endl;}void Beauty_girl::Get_culture( )const {if ( her_culture==true )cout<<"Yes , you are a culture girl "<<endl;elsecout<<"oh no , you are a dirty girl "<<endl;}void Beauty_girl::Get_kind( )const{if ( her_kind_heart==true )cout<<"yes , you are kind heart a girl "<<endl;elsecout<<"shit , you are atrocity a girl "<<endl;}void Beauty_girl::If_virgin( )const{if ( her_virgin==true )cout<<"Congratulations , You Still a Virgin "<<endl;elsecout<<"God , you yet not a virgin "<<endl;}void Beauty_girl::Get_infor( )const{Girl::Get_information( );Get_mettle( );Get_culture( );Get_kind( );If_virgin( );}void Beauty_girl::Judge( )const{if ( her_kind_heart==true ){if ( her_virgin ==true ){if ( her_mettle==true ){cout<<"God Bless , You are a pure girl ! "<<endl;}else{cout<<"Jeez , you'd better train you mettle ! "<<endl;}}else{cout<<"Girl must feel good about herself ! "<<endl;}}else{cout<<"kind heart is most precious in the world ! "<<endl;}}void Beauty_girl::Syn_judge( ){cout<<"--------------Synthesize Judge--------------"<<endl;Judge( );}//Sex_girl member function//void Sex_girl::Get_sex_infor( )const{Beauty_girl::Get_infor( );cout<<"Bust : "<<her_bust<<endl;cout<<"Waist : "<<her_waist<<endl;cout<<"Hip : "<<her_hip<<endl;}void Sex_girl:: Set_sex_chara( bool mettle, bool culture, bool kind_heart, bool virgin, int bust, int waist, int hip ){Beauty_girl:: Set_mettle( mettle );Beauty_girl::Set_culture( culture );Beauty_girl::Set_kind_heart( kind_heart );Beauty_girl::Set_virgin( virgin );Set_bust( bust );Set_waist( waist );Set_hip( hip );}void Sex_girl::Syns_judge( )const {Beauty_girl::Judge( );if ( (her_bust/her_waist)>= 1.2 && (her_bust/her_waist)<=1.5 ){if ( (her_hip/her_waist)>=1.2 && (her_hip/her_waist)<=1.5 ){if ( (her_bust/her_hip)>=0.9 && (her_bust/her_hip)<=1.0 ){cout<<"you body-stature is perfect ! "<<endl;}else{cout<<"you body-stature is Sex ! "<<endl;}}else{cout<<"you must keep you body-stature ! "<<endl;}}else{cout<<"SHIT , you must reduce you weight ! "<<endl;}} 

###上面是类的实现###

 

 

###下面是main()函数###

 

// 公有继承【1】.cpp: 主项目文件。#include "stdafx.h"#include"girl.h"#include<iostream>/* string name , int height , int age, int weight, bool mettle, bool culture, bool kind_heart , bool virgin */int main(array<System::String ^> ^args){Sex_girl kate ;kate.Get_sex_infor( );kate.Syns_judge( );/* bool mettle, bool culture, bool kind_heart, bool virgin int bust, int waist, int hip */cout<<endl;Sex_girl My_Gf;My_Gf.Set_sex_chara( true, true, true, true , 28 , 20 , 25 );My_Gf.Get_sex_infor( );My_Gf.Syns_judge( );system("pause"); return 0;} 

 

 

附注：语言难以阐释的，代码总是通用的。

 

##运行结果：