#01 面向对象设计原则-开闭原则
#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
using namespace std;
//开闭原则 对扩展开放，对修改关闭，增加功能是通过增加代码来实现，而不是去修改源代码
//写一个抽象类
class AbstractCaculator{
public:
virtual int getResult() = 0;
virtual void setOperatorNumber(int a, int b) = 0;
};
//加法计算器类
class PlusCaculator :public AbstractCaculator{
public:
virtual void setOperatorNumber(int a, int b){
this->mA = a;
this->mB = b;
}
virtual int getResult(){
return mA + mB;
}
public:
int mA;
int mB;
};
//减法计算器
class MinuteCaculator :public AbstractCaculator{
public:
virtual void setOperatorNumber(int a, int b){
this->mA = a;
this->mB = b;
}
virtual int getResult(){
return mA - mB;
}
public:
int mA;
int mB;
};
//乘法计算器
class MultiplyCaculator :public AbstractCaculator{
public:
virtual void setOperatorNumber(int a, int b){
this->mA = a;
this->mB = b;
}
virtual int getResult(){
return mA * mB;
}
public:
int mA;
int mB;
};
//取模计算器 通过增加代码来实现
class MultiplyCaculator :public AbstractCaculator{
public:
virtual void setOperatorNumber(int a, int b){
this->mA = a;
this->mB = b;
}
virtual int getResult(){
return mA % mB;
}
public:
int mA;
int mB;
};
void test01(){
AbstractCaculator* caculator = new PlusCaculator;
caculator->setOperatorNumber(10,20);
cout << "ret:" << caculator->getResult() << endl;
delete caculator;
caculator = new MinuteCaculator;
caculator->setOperatorNumber(10, 20);
cout << "ret:" << caculator->getResult() << endl;
}
int main(void){
test01();
return 0;
}
