collection与他们继承类们

1 class A{ 2 static int num = 1; 3 public static void Display(){ 4 System.out.println( num ); 5 } 6 } 7 8 class B extends A{ 9 static int num = 2; 10 public static void Display(){ 11 System.out.println( num ); 12 } 13 } 14 15 class C extends A{ 16 st

#include <iostream> using namespace std; class A { public: A(){} virtual void geta(){ cout << "A:A" <<endl; } virtual void getb(){ cout << "A:B" <<endl; } }; class B :public A{ public: B(){} virtual void g

ActionDescriptor抽象类中几个基本的属性: ControllerName:被描述的Controller名称,去除后缀Controller的名称.例如:HomeController则为Home. ControllerType:属性类型为Type,很好理解为被描述Controller的类型. UniqueId:该属性是用来唯一标识当前描述的Controller的.在其唯有的保护的构造函数中赋值,则说明每一个描述每一个Controller都有唯一的UniqueId.UniqueId的 获

140种事件类型: QEvent::None QEvent::AccessibilityDescription QEvent::AccessibilityHelp QEvent::AccessibilityPrepare QEvent::ActionAdded QEvent::ActionChanged QEvent::ActionRemoved QEvent::ActivationChange QEvent::ApplicationActivate QEvent::ApplicationAct

using System;using System.Collections.Generic;using System.Linq;using System.Text; namespace 继承{class Program { static void Main(string[] args) { chinese p1=new chinese(); p1.name="陈一姐";p1.sayhello(); p1.户口="fujian"; p1.gongfu(); perso

//: ORDER.CPP -- Order of constructor calls // with inheritance #include <iostream.h> #define inherit(derived, base) class derived : public base { public: derived() { cout << #derived << endl; } }; class X {}; inherit(A, X) inherit(B, A)

继承类的范围,构造函数和拷贝控制 当用派生类执行函数的时候,首先会在当前的类里面找 如果找不到就一级一级地往上找. Name Lookup Happens at Compile Time class Quote { public: Quote()=default; Quote(const string &book, double sales_price):bookNo(book), price(sales_price) {cout<<"Quote gouzhao functi

参考文章: http://blog.chinaunix.net/uid-25132162-id-1564955.html http://blog.csdn.net/haoel/article/details/1948051/ 一.虚函数与继承 1.空类,空类单继承,空类多继承的sizeof #include <iostream> using namespace std; class Base1 { }; class Base2 { }; class Derived1:public Base1

类型转换函数与构造转换函数 #include<iostream> class fushu { public: explicit fushu(int num)//避免隐式转换,引发歧义 { x = num; y = num; } void print() { std::cout << x << "+" << y << "i" << std::endl; } operator int(); //不支