策略模式

1、代码

#include <iostream>
using namespace std;
class Company
{
public:
    string name;
    virtual void Management()=0;
};

class Company1:public Company
{
public:
    Company1(string n)
    {
        name=n;
    }

    void printcompany()
    {
        cout<<"负责人"<<name<<endl;
    }

    virtual void Management()
    {
        cout<<"中国分公司:经营模式1的具体实现..."<<endl;
    }
};

class Company2:public Company
{
public:
    Company2(string n)
    {
        name=n;
    }

    void printcompany()
    {
        cout<<"负责人"<<name<<endl;
    }

    virtual void Management()
    {
        cout<<"美国分公司:经营模式2的具体实现..."<<endl;
    }

};

class Company3:public Company
{
public:
    Company3(string n)
    {
        name=n;
    }

    void printcompany()
    {
        cout<<"负责人"<<name<<endl;
    }

    virtual void Management()
    {
        cout<<"法国分公司:经营模式3的实现..."<<endl;
    }
};

class Context
{
public:
    Company *com;
    Context(Company *c)
    {
        com=c;
    }

    void printcompany()
    {
        com->Management();
    }
};

int main()
{
    Company *china=new Company1("张三");
    Company *america=new Company2("张三");
    Company *france=new Company3("张三");
    Context a1(china);
    Context a2(america);
    Context a3(france);
    a1.printcompany();
    cout<<"================================================="<<endl;
    a2.printcompany();
    cout<<"================================================="<<endl;
    a3.printcompany();
}

参考：https://www.cnblogs.com/xiaxiaopi/p/12470548.html