初学设计模式之策略模式

策略模式的代码例子

//策略模式
#include<iostream>
using namespace std;

class strategy
{
public:
virtual void Do()
{};
};
class strategy1:public strategy
{
public:
    void Do()
    {
        cout<<"策略1"<<endl;
    }
};
class strategy2:public strategy
{
public:
    void Do()
    {
        cout<<"策略2"<<endl;
    }
};
class Context
{
private:
    strategy *m_strategyPtr;
public:
    Context(strategy *_strategyPtr)
    {
        m_strategyPtr=_strategyPtr;
    };
    void exec()
    {
        m_strategyPtr->Do();
    };
};
int main()
{
   strategy1 m_Strategy1;
   Context m_Context(&m_Strategy1);
   m_Context.exec();
   strategy1 m_Strategy2;
    Context m_Context2(&m_Strategy2);
   m_Context2.exec();
   getchar();
   return 0;
};