copy constructor

// RightValue.cpp : Defines the entry point for the console application. // #include "stdafx.h" #include <iostream> #include <algorithm> #include <vector> #include <ctime> using namespace std; class CMyObj{ protected: uns

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G + + error: Error: declaration of xxx shadows parameter Explanation: http://www.parashift.com/c++-faq-lite/ctors.html # faq-10.3 [10.3] Can one constructor of a class call another constructor of the same class to initialize the this object? Nope. Le

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C + + new and delete From: C + + _Primer_Plus_4th Classes Whose Constructors Use new Classes that use the new operator to allocate memory pointed to by a class member require several precautions in the design. (Yes, we summarized these precautions re

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To be an object Clone, then to achieve the Clone () interface, this interface does not define any way, but if you do not implement this interface, then call the clone method, when there will be CloneNotSupportedException, this is the type of interfac

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1, the constructor call the virtual function problem. Note: Generally the compiler will finish base subject in the implementation of the constructor and call the user code, the implementation of the current object vptr initialization. Therefore, if t

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The time of the interview or written test or examination often asked to. The prototype known as the String class: C + + code 1. Class String 2. { 3. Public: 4. String (const char * str = NULL); / / normal constructor 5. String (const String & other);

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The needs of the recent work, I pick C + + programming language; relived Bjarne Stroustrup's masterpiece "The C + + Programming Language", there are still many things not quite understand, but still want to be able to sum up the experience of le

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The needs of the recent work, I pick C + + programming language; relived Bjarne Stroustrup's masterpiece "The C + + Programming Language", there are still many things not quite understand, but still want to be able to sum up the experience of le

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What is the shallow and deep copying of objects in C + +? A shallow copy of object copies all of the member field values. This works well if the fields are values, and pointer will be copied, but the memory it points to will not be copied. So the obj

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1. Seeking the return value of the following (Microsoft) int func (x) { int countx = 0; while (x) { countx + +; x = x & (x-1); } return countx; } Assuming x = 9999. Answer: 8 Ideas: the x into the 2-band, to see with the number 1. 2. What is a "r

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Summary: QT in the regular expressions and perl regular expressions in a similar, QT in QRegExp class implements regular expressions. public member function: public member functions are divided into three categories First, the constructor 1, the defa

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Your class needs a constructor? Members of your data is private it? Your class needs a no-argument constructor? Is not every constructor initializes all the structure members? Class needs a destructor it? Class needs a virtual destructor it? You need

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1, when creating a class, C + + compiler will by default have the following functions: A(void); // The default parameterless constructor A(const A &a); // The default copy constructor ~A(void); // The default destructor A & operate =(const A &

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To illustrate our String class as an example: First define the String class, but does not achieve its member functions. Class String { public: String (const char * ch = NULL); / / default constructor String (const String & str); / / copy constructor

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27. While the enumeration type is not extended, but can implement interfaces, extend it to simulate. 26. Please EnumSet instead of bit field, instead of using EnumMap ordinal index. 25. Do not use the export ordinal enumeration value associated with

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Implementation Notes: a simple implementation of the string class String, the internal character array used to achieve Operating platform: VS2010 Reference: http://rsljdkt.javaeye.com/blog/770072 Experience description: copy constructor, overloaded a

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This article is about the C + + offers some of the automatically generated by the compiler function, and these functions for you, perhaps unknowable. In the programming world, there is no more scary than the unknown. C + + automatically provides the

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This article is about C + + offers some of the automatically generated by the compiler function, and these functions for you, and perhaps unknowable. In the programming world, no more scary than the unknown. C + + automatically provides the following

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1, the compiler automatically generates the basic functions C + + compiler will not declare the developer when the following function, declare their own version of the compiler. class Empty () Equivalent to the following statement class Empty ( publi

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A simple and easy class String, use the constructor, destructor, operator overloading, copy constructor, a friend function of such knowledge Reference: "high-quality C + + C Programming Guide" Operating platform: VS2008 #include<iostream>

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Simple and Easy String class, use the constructor, destructor, operator overloading, copy constructor, friend function of such knowledge Reference: "high-quality C + + C Programming Guide" Running Platform: VS2008 #include<iostream> using

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Memory leak is the C + + programmers have headaches a big problem. C + + lacks, like JAVA, C #, like, have a useful weapon in the GC so it's part of the memory management authority to the programmer. Although the existence of GC saves development tim

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Because C + + compiler default output for you a copy constructor and copy assignment but you do not want to have a copy of your object function, your goal is to stop copying! Most people would say that as long as the statement of private copy constru

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Class (including the template class) constructor is the real constructor; template constructor, however, its essence is the template function. Not confuse these two. In a template class, constructor, and template constructor exist, the first call the

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Copy constructor, often called X (X &), is a special constructor, he calls by the compiler to perform some of the same class of other objects based on the components and initialization. It's the only one parameter (object reference) is immutable (bec

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There is a lot of syntax inconsistencies in C + +, which makes C + + harder for people to understand. For example, = sometimes denotes copy assignment. Sometimes it denotes copy construction. #include <iostream> using namespace std; class Thing { pu

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In C + +, for a const member variable initialization form: class test{ private: const int x; public: test(int a):x(a) { } }; Initial column is called by members of the initialization, if the assignment in the constructor of the body is called the ass

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For an empty class, the compiler produces four default default member functions, default constructor, destructor, copy constructor and assignment functions.

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For an empty class, the compiler produces four default default member functions, default constructor, destructor, copy constructor and assignment functions.

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weak_ptr Header: "boost / weak_ptr.hpp" weak_ptr is shared_ptr observers. It does not interfere with ownership shared by shared_ptr. When a shared_ptr is weak_ptr the observed to the release of its resources, it will set the pointer associated w

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Cloud winds recently wrote a blog " C Language Past and Present . " As a long-term use of C language development network game server programmers, clouds the wind is reason to write such a text, but still feel not enough to talk about depth, C la

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When copies of objects are made A copy constructor is called whenever a new variable is created from an object. This happens in the following cases (but not in assignment). A variable is declared which is initialized from another object, eg, Person q

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A shallow copy of an object copies all of the member field values. This works well if the fields are values, but may not be what you want for fields that point to dynamically allocated memory. The pointer will be copied. But the memory it points to w

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In the process of developing a web application, need to develop a service using the ftp function to a data transmission network, the ftp server. Originally used sun.net.ftp.ftpClient class, but has encountered a problem, no problem in the net test, w

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First, the definition of class C ( public: std:: string name; ); / / Correct pointer to an object with C * cc = new C (); cc-> name = "ddd"; std:: cout <<(cc-> name) <<std:: endl; / / Correct, not a pointer, the default class c

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1, when an empty class is not empty? When the C + + compiler, after they handled. 2, if you write: class Empty (); Its meaning is equivalent to: class Empty ( public: Empty (); Empty (const Empty & rhs); ~ Empty (); Empty & operator = (cosnt Empty

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Reference copy: Object a = new Object(); Object b = a; Object *a = new Object(); Object *b = a; Shallow copy: Object a = new Object(); Object b = a.clone(); Object a; Object b = a; Deep copy: need to override the clone function java. c + + need to ov

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Is the string class contains the following common functions: string class constructor: string (const char * s); / / initialize with c string s string (int n, char c); / / with n characters c initialization addition, string class also supports the def

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String representation: Char * Char [] string String Wchar Need to implement a string class method: Default constructor destructor copy constructor assignment function of other auxiliary functions 1. String and plastic conversion between: Asked not to

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String representation: Char * Char [] string String Wchar Need to implement a string class method: Default constructor destructor copy constructor assignment function of other auxiliary functions 1. String and plastic conversion between: Asked not to

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1, vector features: (1) content on a continuous storage area, index, and iteration of very fast. (2) if the current storage space is not enough, need to re-allocate a larger area, copies of the original object to the new store, the original object de

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1, all the basic sequence containers (vector, list, deque) supported by the operation. Example code: #include <deque> #include <iostream> #include <list> #include <vector> using namespace std; template<typename Container> voi

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Reference links: http://hi.baidu.com/% BF% AA% D0% C4de% B9% FB% D7% D3/blog/item/2ea64f318c4cd290a8018e75.html On the copy constructor and assignment operator 2009-07-21 16:23 On the copy constructor and assignment operator of: Ping Mingde Focus: me

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