context.cpp

c++程序

//Context.cpp
#include "Context.h" 
#include "Strategy.h" 
#include <iostream> 
using namespace std;

Context::Context(Strategy* stg) 
{ 
	_stg = stg; 
}

Context::~Context() 
{
	if (!_stg) delete _stg; 
}

void Context::DoAction() 
{
	_stg->AlgrithmInterface();
}