我该如何自动安排？(How can I make proper arrangement automatically?)

 是的，这是针对OOP的。 你的关系是has-a ，而不是is-a 。 
 
 你应该使用组合而不是继承。 
 
class Country{
      Military m;  //Country has-a military
      int a,b;
public:
      Country();
      void doSomething();
}

class Military{
      Technology t; //Military has-a technology
public:
      Military();
      void doAnother();
      void doAnother2();
}

class Technology{
public:
      Technology();
      void doAnother3();
}

Yes, it's against OOP. You relationships are has-a, not is-a.
 
You should use composition instead of inheritance for this.
 
class Country{
      Military m;  //Country has-a military
      int a,b;
public:
      Country();
      void doSomething();
}

class Military{
      Technology t; //Military has-a technology
public:
      Military();
      void doAnother();
      void doAnother2();
}

class Technology{
public:
      Technology();
      void doAnother3();
}