Ray's playground

摘要： Anything GoesCode highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--1#include<iostream>2#include<string>3#include<utility>4#include<vect... 阅读全文

摘要： An abstract class is an interface. A class hierarchy is a means of building classes incrementally.Naturally, every class provides an interface to users and some abstract classes provide significantfun... 阅读全文

摘要： Implicit conversion can be suppressed by declaring a constructor explicit. That is, anexplicitconstructor will be invoked only explicitly. In particular, where a copy constructor is in principleneeded... 阅读全文