原型模式

C++

参考：https://www.cnblogs.com/Galesaur-wcy/p/15924300.html

#include <iostream>
#include <string>
using namespace std;

class WorkExprerience
{
private:
    string workDate;
    string company;

public:
    WorkExprerience() {}
    ~WorkExprerience() {}

    WorkExprerience(WorkExprerience *work)
    {
        this->workDate = work->workDate;
        this->company = work->company;
    }

    string getWorkDate()
    {
        return workDate;
    }

    void setWorkDate(string workDate)
    {
        this->workDate = workDate;
    }

    string getCompany()
    {
        return company;
    }

    void setCompany(string company)
    {
        this->company = company;
    }

    WorkExprerience *Clone()
    {
        return new WorkExprerience(this);
    }
};

class Prototype
{
protected:
    string name;
    string sex;
    string age;
    string timeArea;
    string company;

public:
    virtual void SetPersonalInfo(string sex, string age) = 0;
    virtual void Display() = 0;
    virtual Prototype &Clone() = 0;
};

class Resume : public Prototype
{
private:
    WorkExprerience *workExp;

public:
    Resume(string name)
    {
        this->name = name;
        workExp = new WorkExprerience();
    }
    ~Resume()
    {
        if (workExp != NULL)
            delete workExp;
    }
    void SetPersonalInfo(string sex, string age)
    {
        this->sex = sex;
        this->age = age;
    }
    void SetWorkExperience(string workDate, string company)
    {
        workExp->setCompany(company);
        workExp->setWorkDate(workDate);
    }
    void Display()
    {
        cout << name << "  " << age << " " << sex << "  " << endl;
        cout << "工作经历  " << workExp->getWorkDate() << "  " << workExp->getCompany() << endl;
    }
    Resume &Clone()
    {
        Resume *clonedResume = new Resume(name);
        clonedResume->SetPersonalInfo(sex, age);
        return *clonedResume;
    }
};

int main()
{
    Resume *a = new Resume("big bird");
    a->SetPersonalInfo("MAN", "22");
    a->SetWorkExperience("1998-2000", "baidu");

    Resume b = a->Clone();
    b.SetWorkExperience("2000-2008", "google");

    Resume c = a->Clone();
    c.SetWorkExperience("2010-2018", "apple");

    a->Display();
    b.Display();
    c.Display();

    return 0;
}

C

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

typedef struct
{
    char workDate[50];
    char company[50];
} WorkExperience;

typedef struct
{
    char name[50];
    char sex[10];
    char age[10];
    char timeArea[50];
    char company[50];
} PersonalInfo;

typedef struct Resume Resume;
struct Resume
{
    PersonalInfo info;
    WorkExperience *workExp;
    void (*display)(Resume *);
    Resume *(*clone)(Resume *);
};

void DisplayResume(Resume *resume);
Resume *CloneResume(Resume *original);

void InitWorkExperience(WorkExperience *exp)
{
    strcpy(exp->workDate, "");
    strcpy(exp->company, "");
}

void SetWorkExperience(WorkExperience *exp, const char *date, const char *company)
{
    strcpy(exp->workDate, date);
    strcpy(exp->company, company);
}

void DisplayWorkExperience(const WorkExperience *exp)
{
    printf("工作经历  %s  %s\n", exp->workDate, exp->company);
}

Resume *CreateResume(const char *name)
{
    Resume *resume = (Resume *)malloc(sizeof(Resume));
    strcpy(resume->info.name, name);
    strcpy(resume->info.sex, "");
    strcpy(resume->info.age, "");
    strcpy(resume->info.timeArea, "");
    strcpy(resume->info.company, "");
    resume->workExp = (WorkExperience *)malloc(sizeof(WorkExperience));
    InitWorkExperience(resume->workExp);
    resume->display = DisplayResume;
    resume->clone = CloneResume;
    return resume;
}

void DestroyResume(Resume *resume)
{
    if (resume)
    {
        if (resume->workExp)
            free(resume->workExp);
        free(resume);
    }
}

void SetPersonalInfo(Resume *resume, const char *sex, const char *age)
{
    strcpy(resume->info.sex, sex);
    strcpy(resume->info.age, age);
}

void SetWorkExperienceForResume(Resume *resume, const char *date, const char *company)
{
    SetWorkExperience(resume->workExp, date, company);
}

void DisplayResume(Resume *resume)
{
    printf("%s  %s %s  \n", resume->info.name, resume->info.age, resume->info.sex);
    DisplayWorkExperience(resume->workExp);
}

Resume *CloneResume(Resume *original)
{
    Resume *cloned = CreateResume(original->info.name);
    strcpy(cloned->info.sex, original->info.sex);
    strcpy(cloned->info.age, original->info.age);
    SetWorkExperienceForResume(cloned, original->workExp->workDate, original->workExp->company);
    return cloned;
}

int main()
{
    Resume *a = CreateResume("big bird");
    SetPersonalInfo(a, "MAN", "22");
    SetWorkExperienceForResume(a, "1998-2000", "baidu");

    Resume *b = a->clone(a);
    SetWorkExperienceForResume(b, "2000-2008", "google");

    Resume *c = a->clone(a);
    SetWorkExperienceForResume(c, "2010-2018", "apple");

    a->display(a);
    b->display(b);
    c->display(c);

    DestroyResume(a);
    DestroyResume(b);
    DestroyResume(c);

    return 0;
}

总结

关键在于实现一个Clone函数！！！
与拷贝构造函数相比就是：方便扩展，动态灵活定义拷贝行为(而且可被继承)