我不用“OIOIC对象模型”

zhujiang73

原帖由 doctorjxd 于 2007-9-17 20:22 发表
楼主为什么不对91楼的代码回应？

因为 Pervise 不是本楼的业主。

yuanchengjun

virtual f() {   直接父类1::f();   直接父类2::f();   …… }

省略号表示当前类在f函数中要做的事情。
如果是自底向上调用一边，那么省略号放到f函数最前面。

ococi怎么写？

[ 本帖最后由 yuanchengjun 于 2007-9-17 20:48 编辑 ]

yuanchengjun

原帖由 Pervise 于 2007-9-17 20:46 发表


你直接从O1~O12逐个调用，那不更简单。

当你调用O11的时候呢？是不是又要重新写一遍？
我这么处理，每个类的f函数，都有你说的效果。

yuanchengjun

原帖由 Pervise 于 2007-9-17 20:58 发表


每个对象都不用理会在它后面会有什么样的继承，做好自己的事情就行了。

对于每个对象来说是对；

但是对于每一个类来说呢？
只有最底层类才创建对象吗？
所有继承链中间类都不实例化对象了？
如果实例化对象，是不是要重新实现一边整个调用过程呢？

doctorjxd

原帖由 Pervise 于 2007-9-17 20:58 发表


每个对象都不用理会在它后面会有什么样的继承，做好自己的事情就行了。

yuanchengjun 也是这样做的呀。

zhujiang73

原帖由 Pervise 于 2007-9-17 20:34 发表



在每一个O里加入同一行为，通过访问O12触发这个行为，进而按从上到下、从左到右的顺序，不可重入地，调用每一个O的同一行为。看你怎么实现？

是要这个么？

#include <iostream> class O1 { &nbsp;&nbsp;&nbsp;public:   &nbsp;&nbsp;&nbsp;&nbsp;int  a1;    &nbsp;&nbsp;&nbsp;&nbsp;void show () { std::cout << "O1" << std::endl; }; }; class O2 :virtual public  O1 { &nbsp;&nbsp;&nbsp;public: &nbsp;&nbsp;&nbsp;&nbsp;int   a2;    &nbsp;&nbsp;&nbsp;&nbsp;void show () { std::cout << "O2" << std::endl; }; }; class O3 :virtual public O1 { &nbsp;&nbsp;&nbsp;public: &nbsp;&nbsp;&nbsp;&nbsp;int   a3;    &nbsp;&nbsp;&nbsp;&nbsp;void show () { std::cout << "O3" << std::endl; }; }; class O4 :virtual public O1 { &nbsp;&nbsp;&nbsp;public: &nbsp;&nbsp;&nbsp;&nbsp;int   a4;    &nbsp;&nbsp;&nbsp;&nbsp;void show () { std::cout << "O4" << std::endl; }; }; class O5 :virtual public O2 { &nbsp;&nbsp;&nbsp;public: &nbsp;&nbsp;&nbsp;&nbsp;int   a5;    &nbsp;&nbsp;&nbsp;&nbsp;void show () { std::cout << "O5" << std::endl; }; }; class O6 :virtual public O2, virtual public O3 { &nbsp;&nbsp;&nbsp;public: &nbsp;&nbsp;&nbsp;&nbsp;int   a6;    &nbsp;&nbsp;&nbsp;&nbsp;void show () { std::cout << "O6" << std::endl; }; }; class O7 :virtual public O3, virtual public O4 { &nbsp;&nbsp;&nbsp;public: &nbsp;&nbsp;&nbsp;&nbsp;int   a7;    &nbsp;&nbsp;&nbsp;&nbsp;void show () { std::cout << "O7" << std::endl; }; }; class O8 :virtual public O4 { &nbsp;&nbsp;&nbsp;public: &nbsp;&nbsp;&nbsp;&nbsp;int   a8;    &nbsp;&nbsp;&nbsp;&nbsp;void show () { std::cout << "O8" << std::endl; }; }; class O9 :virtual public O5, virtual public O6 { &nbsp;&nbsp;&nbsp;public: &nbsp;&nbsp;&nbsp;&nbsp;int   a9;    &nbsp;&nbsp;&nbsp;&nbsp;void show () { std::cout << "O9" << std::endl; }; }; class O10 :virtual public O6, virtual public O7 { &nbsp;&nbsp;&nbsp;public: &nbsp;&nbsp;&nbsp;&nbsp;int   a10;    &nbsp;&nbsp;&nbsp;&nbsp;void show () { std::cout << "O10" << std::endl; }; }; class O11 :virtual public O7, virtual public O8 { &nbsp;&nbsp;&nbsp;public: &nbsp;&nbsp;&nbsp;&nbsp;int   a11;    &nbsp;&nbsp;&nbsp;&nbsp;void show () { std::cout << "O11" << std::endl; }; }; class O12 :virtual public O9, virtual public O10, virtual public O11 { &nbsp;&nbsp;&nbsp;public: &nbsp;&nbsp;&nbsp;&nbsp;int   a12;    &nbsp;&nbsp;&nbsp;&nbsp;void show () { std::cout << "O12" << std::endl; }; &nbsp;&nbsp;&nbsp;&nbsp;void show_all(); }; void  O12::show_all() { &nbsp;&nbsp;&nbsp;&nbsp;O1::show(); &nbsp;&nbsp;&nbsp;&nbsp;O2::show(); &nbsp;&nbsp;&nbsp;&nbsp;O3::show(); &nbsp;&nbsp;&nbsp;&nbsp;O4::show(); &nbsp;&nbsp;&nbsp;&nbsp;O5::show(); &nbsp;&nbsp;&nbsp;&nbsp;O6::show(); &nbsp;&nbsp;&nbsp;&nbsp;O7::show(); &nbsp;&nbsp;&nbsp;&nbsp;O8::show(); &nbsp;&nbsp;&nbsp;&nbsp;O9::show(); &nbsp;&nbsp;&nbsp;&nbsp;O10::show(); &nbsp;&nbsp;&nbsp;&nbsp;O11::show(); &nbsp;&nbsp;&nbsp;&nbsp;O12::show(); } int main(int argc, char *argv[]) { &nbsp;&nbsp;&nbsp;&nbsp;O12  *p_12; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;p_12 = new O12; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;p_12->a1 = 1; &nbsp;&nbsp;&nbsp;&nbsp;p_12->a2 = 2; &nbsp;&nbsp;&nbsp;&nbsp;p_12->a3 = 3; &nbsp;&nbsp;&nbsp;&nbsp;p_12->a4 = 4; &nbsp;&nbsp;&nbsp;&nbsp;p_12->a5 = 5; &nbsp;&nbsp;&nbsp;&nbsp;p_12->a6 = 6; &nbsp;&nbsp;&nbsp;&nbsp;p_12->a7 = 7; &nbsp;&nbsp;&nbsp;&nbsp;p_12->a8 = 8; &nbsp;&nbsp;&nbsp;&nbsp;p_12->a9 = 9; &nbsp;&nbsp;&nbsp;&nbsp;p_12->a10 = 10; &nbsp;&nbsp;&nbsp;&nbsp;p_12->a11 = 11; &nbsp;&nbsp;&nbsp;&nbsp;p_12->a12 = 12; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;std::cout << "p_12->a1 = " << p_12->a1 << std::endl; &nbsp;&nbsp;&nbsp;&nbsp;std::cout << "p_12->a7 = " << p_12->a7 << std::endl; &nbsp;&nbsp;&nbsp;&nbsp;std::cout << "p_12->a9 = " << p_12->a9 << std::endl; &nbsp;&nbsp;&nbsp;&nbsp;std::cout << "p_12->a12 = " << p_12->a12 << std::endl; &nbsp;&nbsp;&nbsp;&nbsp;p_12->show_all(); &nbsp;&nbsp;&nbsp;&nbsp;delete  p_12; &nbsp;&nbsp;&nbsp;&nbsp;return 0; }