研究了一下虚拟继承时，对象的内存分布模型，写了下面这个小程序 #include struct A {int x;int y; }; struct B : virtual public A { int a; B(){x=1;y=2;a=55;} }; struct C : virtual public A { int b; C(){x=3;y=4;b=66;} }; struct D : public B, public C { };//菱形继承 int main(void) { A a; B b; C c; D d; D *pd = &d; C *pd_c =(C*)(&d); B *pd_b =(B*)(&d); A *pd_a =(A*)(&d); printf("%d,%d,%d,%d\n",s...

#include ; class Base { public: virtual void g(void){ cout << "Base::g(void)" << endl;} }; class Derived : public Base { public: virtual void g(void){ cout << "Derived::g(void)" << endl;} }; void main(void) { Derived d; Base p(d); Base *pb = & p.g(); pb->;g(); } 请问一下，主函数里面执行后的结果是什么？说明一下理由最好了，...

对虚存的理解有点模糊，影响其大小的因素有哪些呢？

对虚存的理解有点模糊，影响其大小的因素有哪些呢？

// world.cpp : Defines the entry point for the console application. // #include "stdafx.h" #include using std::cout; using std::cin; using std::endl; class X{ int y; }; class A{ public: virtual void go(){}; int x; }; class B :virtual public A{ int x; }; class C : public virtual A{ int x; }; class D :virtual public B,virtual public C{ int x; }; ...

printf "%d\n", (unsigned long)(&((struct inode *)0)->i_list怎么理解(&((struct inode *)0)->i_list

runq-sz – The average number of kernel threads in memory waiting for a CPU to run. Typically, this value should be less than 2. Consistently higher values mean that the system may be CPU bound.

如题

请教高手有关c++中的派生、多态和虚函数的问题。 以下是我做的测试程序， 基类 class A { public : A ( const char* v_name ); protected : virtual void updateSelf( const char * obj){cout << "run in A class " << endl;}; private : void update( const char * v_obj){ updateSelf ( const char * v_obj)}; } 派生类 class B { public : B ( const char* v_name ); protected : virtual void updateSelf(...

/* * Created on 2004-8-31 * * TODO To change the template for this generated file go to * Window - Preferences - Java - Code Style - Code Templates */ /** * @author diyer6 * * TODO To change the template for this generated type comment go to * Window - Preferences - Java - Code Style - Code Templates */ /* 类的继承 1、在java中通过关键字 extends 继承一个已有的类，被继承的类成为父类（基类），新的类...