设计模式之简单工厂模式：c++实现

////operateFactory.h
#include <stdio.h>

class BaseOperate
{
public:
BaseOperate():mNumberA(0),mNumberB(0)
{


}
virtual ~BaseOperate()
{


}

void setNumberA(double number)
{
mNumberA=number;
}
void setNumberB(double number)
{
mNumberB=number;
}
double getNumberA()
{
return mNumberA;
}
double getNumberB()
{
return mNumberB;
}
virtual double getResult()=0;
protected:
private:
double mNumberA;
double mNumberB;
};


class OperateAdd : public BaseOperate
{
public:
OperateAdd()
{}
~OperateAdd()
{}
double getResult()
{
double result = 0;
result = getNumberA()+getNumberB();
return result;
}
protected:
private:
};

class SimpleFactory
{
public:
SimpleFactory();
~SimpleFactory();
BaseOperate* getObject(char op);
protected:
private:
BaseOperate* object;

};

/////////////////////////////////////////////////////////////////////
#include "operateFactory.h"
#include <stdio.h>
SimpleFactory::SimpleFactory()
{
object = NULL;
}
SimpleFactory::~SimpleFactory()
{
if (object)
{
delete object;
}
}
BaseOperate* SimpleFactory::getObject(char op)
{
if(op == '+')
{
object = new OperateAdd();
}
return object;
}

//////////////main.cpp
#include <iostream>
using namespace std;
void  main()
{
BaseOperate* opra;
SimpleFactory factory;
opra = factory.getObject('+');
opra->setNumberA(100);
opra->setNumberB(56);
double sums = opra->getResult();
cout<<"result is: "<<sums<<endl;
}