设计模式-简单工厂（1，简单继承，用来比较与工厂模式的区别）

这里，就只附上简单的代码了，有兴趣的同学可以复制运行一下，主要是为了看出继承与简单工厂模式的区别#include <iostream>class Operation {private: double _numberA; double _numberB;public: //Operation(){}; double getNumberA(){ return _numberA; } void setNumberA(int value){ _numberA = value; } double getNumberB(){ return _numberB; } void setNumberB(int value){ _numberB = value; } virtual double getResult(){ double result=0; return result; }};class OperationAdd:public Operation{private: public: double getResult(OperationAdd* flag){ double result=0; result = flag->getNumberA() + flag->getNumberB(); return result; }};// 写到这里只是一个简单的继承int main(int argc, const char * argv[]) { // insert code here... OperationAdd* ope = new OperationAdd(); ope->setNumberA(5); ope->setNumberB(6); int res = ope->getResult(ope); std::cout<<res<<std::endl; return 0;}</iostream>