June 11, 2022 diary: Mr. Wang's spring, mixed in

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ANSER

template <typename...T>
class role : public T... // Take the passed template parameter as the parent of the template of this class 
{
    
public:
	role() : T()..., m_attack(0.0), m_defence(0.0), m_life(100.0) {
    }// At the beginning, the attack power and defense power are both 0, Blood volume 100;
	role(double att, double def, double life) : T()..., m_attack(att), m_defence(def), m_life(life) {
    }
public:
	double m_attack; // aggressivity 
	double m_defence; // Defense 
	double m_life;    // Blood volume （ Health value ）
};

template <typename...T>
class family
{
    
public:
	vector< role<T...> > m_members;
	//.... Other information 
};

using role_npc = role<npcattr>;
using role_player = role<playerattr>;
using role_mixnpc = role<npcattr,playerattr>; // Convenient combination through mixing technology , Free assembly of various functions 
using family_npc = family<npcattr>;

This programming method solves the following problems , It can be said that whoever uses it knows .

//role Character class , Representing game player , Including attack power , Defense , Blood volume （ Health value ）：
class role
{
    
public:
	// Constructors ：
	role() :m_attack(0.0), m_defence(0.0), m_life(100.0) {
    }// At the beginning, the attack power and defense power are both 0, Blood volume 100;
	role(double att,double def,double life):m_attack(att), m_defence(def), m_life(life) {
    } 

public:
	double m_attack; // aggressivity 
	double m_defence; // Defense 
	double m_life;    // Blood volume （ Health value ）
	//......
};
class family
{
    
public:
	vector<role> m_members;
	//.... Other information 
};
// The monster 、NPC（ Non player characters ）. NPC classification ：0： Represents this kind of decoration of game scenes NPC,1： On behalf of businessmen , Selling clothes .2： Delegates send game tasks to players .  Talking to oneself .
template<typename T>
class family
{
    
public:
	//vector<role> m_members;
	vector<T> m_members;
	//.... Other information 
};

//npc Attribute class 
struct npcattr
{
    
	int m_sort; //npc species ：0： Represents this kind of decoration of game scenes NPC,1： On behalf of businessmen , Selling clothes .2： Delegates send game tasks to players .
	std::string m_lang; // Record a sentence you say to yourself 
};

NPC class 
class role_npc :public role
{
    
public:
	// Constructors 
	role_npc(): role(), m_strucattr{
     0,"" }{
    }
	role_npc(double att, double def, double life, int sort, std::string lang) :role(att, def, life), m_strucattr{
     sort,lang } {
    }

public:
	npcattr m_strucattr;
};