template模式

#include <iostream>
using namespace std;
class AbstractClass {
public:
    AbstractClass() {
    }
    virtual ~AbstractClass() {
    }
// 这个函数中定义了算法的轮廓
    void TemplateMethod();
protected:
// 纯虚函数,由派生类实现之
    virtual void PrimitiveOperation1() = 0;
    virtual void PrimitiveOperation2() = 0;
};
// 继承自AbstractClass,实现算法
class ConcreateClass: public AbstractClass {
public:
    ConcreateClass() {
    }
    virtual ~ConcreateClass() {
    }
protected:
    virtual void PrimitiveOperation1();
    virtual void PrimitiveOperation2();
};

void AbstractClass::TemplateMethod() {
    PrimitiveOperation1();
    PrimitiveOperation2();
}
void ConcreateClass::PrimitiveOperation1() {
    cout << "PrimitiveOperation1 by ConcreateClass\n";
}
void ConcreateClass::PrimitiveOperation2() {
    cout << "PrimitiveOperation2 by ConcreateClass\n";
}

int main() {
    AbstractClass* pConcreateClass = new ConcreateClass;
    pConcreateClass->TemplateMethod();
    delete pConcreateClass;
    return 0;
}