类厂模式

所谓的类厂模式是提供一个类专门来创建对象，代码如下：#include <iostream>using namespace std;class A{public: void dis(){cout<<"A::dis"<<endl;}void release(){delete this;}};class Factory{public: void Create(A** a) { *a = new A; } void release() { delete this; }};void CreateFactory(Factory** fa){ *fa = new Factory;}int main(){Factory* f = NULL;CreateFactory(&f);f->release();A* a = NULL;f->Create(&a);a->dis();a->release(); return 0;}