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#include #includestring>#includeclassStudent { Public: Student (std::stringname) {_name=name; } ~Student () {}voidPrintname () {std::coutStd::endl; }Private: std::string_name;}; intMain () {std::stringName ="Xiaowang"; Std::unique_ptrNewStudent (name)); //Student p = Student (name); //p.printname ();P->Printname (); return 0;} Compile: Default g++3.4.5 report The following error, Unique_ptr is c++11, g++3.4.5 does not seem to support this. Main.cpp

Link: http://www.coderbolg.com/content/83.html Ah ...... God,./configure reports an error:Configure: Error: C ++ compiler cannot create executables. Alas, we reinstalled the system on the test server today and set up the IP address to allow remote access. We came back to install the software and encountered a problem when setting up the PHP + nginx environment. The problem occurs when the libmcrypt packag

There is a simple class:Class clxtest { Public: Clxtest (INT isize = 13) {pszstr = new char [isize];}; ~ Clxtest () {If (pszstr) Delete [] pszstr ;}; Lxoutput () {cout PRIVATE:Char * pszstr;}; The following two lines of code are available:Clxtest * Ptest = new clxtest (); Clxtest * Ptest = new clxtest; I think everyone knows that the effects of the two methods are the same-both declare a pointer to an object like clxtest, and when creating an object, all call the default constructor of the clas

empty arrayError Reason: Array subscript is out of boundsSolution: Print Check the number of arrays and modify as neededUnrecognized selector sent to instanceCause: A non-existent method was called and the method was deleted/commented/Name modifiedWorkaround: Carefully check the method name, use the correct and existing method nameNot key value for the key ... Redundant connectionsCause: The Iboutlet attribute code is deleted/commented, but the attribute line is stillRoot cause: Attribute missi

": [" cmd ","/C "," g++ "," ${file} ","-O "," ${file_path}/${file_base_name} "," "," Start "," cmd ","/C "," ${file_path}/${file_base _name} Pause "] } ]}Ctrl+s will be prompted to save, please ensure that the file name is in the format "Xxx.sublime-build"XXX is casual, I changed to "C++.sublime-build"After this step, select the scenario you just sav

left operand of the two-tuple operator +, when we perform a semantic check on the two-tuple operator, we call the Adjust () function in the Checkbinaryexpression function to type-adjust the Zuozi so that the type of the ARR node is from int [3][4] adjust to int (*) [4], which is what we usually say in the C language, "the array name arr represents is the first address of the No. 0 element of the array arr[0]." Strictly speaking, this is not accurate

1. The optimization options of VC-> Project-> setting-> C/C ++ depend on and category drop-down box: General Provides the most effective method to select a general optimization goal, but does not allow fine-grained control of a single optimization technology. There are five options under the optimization option: Default, disable (Debug), maximize speed, minimize size, and customize. Disable disables all

This section tells you how to prevent objects from being copied (hidden and cannot be called by someone else)Two methods:1. Declaring a copy constructor as private and declaring a function without defining it#include #includeclassDummy { Public: Dummy (intD =0): Data (d) {} Dummy*getcopy () {Dummy* x =NewDummy (* This); returnx; }Private: intdata; Dummy (Constdummyorg);};intMain () {Dummy D (1); //Would case link errord.getcopy (); //Would case compile errorDummy D2 (d); return 0;}It is not d

Singleton.h class singleton{ public : static Singleton* getinstance () { if (instance == = new Singleton (); return instance; private : static Singleton * instance; Singleton () {};}; singleton * singleton::instance = NULL; Main.cppint* instance == singleton::getinstance (); return 0 ;}The reason is that only the static variable instance of the singleton class is declared, but the variable definition is missing, resulting in an "unresolved symbol" error.A solution to the

If the object you want to define for your class is unique, that is, the object cannot be copied, or assigned to another object using an assignment operation, the best way is to disable the copy constructor and the assignment operator. Several disabled methods are described below. (method from effective C + +, similar to if you want to disable other functions of the class) 1. Defined as private and does not implement itAs we know, the copy constructor

In C ++, the type search process is relatively simple, basically the name search, which is not described here. For a function (or member function) called in the. cpp file, the compiler mainly does the following three things:1. Search for the name.First, you can find the name in the visible name entity in the compilation unit.(1) class member functions take precedence (class of the object-"base class ). Stop

Have you ever wondered why sometimes the main () function is the entry address and the winmain () function is the entry address in Win32, in fact, it is set when the compiler dynamically links to CRT [C Runtime Library (part of the C standard library )]. The Program sets the breakpoint. Let's look at the crtexe. C code

[Email protected] httpd-2.2.31]#/configure--prefix=/usr/local/apache2Checking for chosen layout ... ApacheChecking for working mkdir-p ... yesChecking build system Type ... I686-pc-linux-gnuChecking host system Type ... I686-pc-linux-gnuChecking target system Type ... I686-pc-linux-gnuConfiguring Apache Portable Runtime Library ...Checking for APR ... reconfigConfiguring Package in SRCLIB/APR nowChecking build system Type ... I686-pc-linux-gnuChecking host system Type ... I686-pc-linux-gnuChecki

When QtCreator (Visual C ++ compiler) is compiled, it prompts the solution of warning C4819. A similar warning is often reported when you compile a program using QtCreator + Visual C ++ compiler. Warning C4819: The file contains characters that cannot be expressed in the current Code Page (936. Save the file as Un

The C + + compiler provides default 6 function 1, constructor 2, copy constructor 3, destructor 4,= overloaded function 5, overloaded function 6,const overloaded function#include Default 6 functions provided by the C + + compiler

In chapter 1, sample1CodeBasicallyC LanguageTherefore, the CPP file in the new job should be changed to the C file. However, the error fatal error c1853: "Debug/release 1.pch" is not a precomplied header file with this complier ...... What should I do if this is the first time I encountered this problem? Baidu, the solution is as follows: Error cause: This error occurs because the project is mixed. CPP and.

C ++ Object Memory layout -- ⑤ GCC compiler -- a single virtual inheritance The GCC compiler of GNU is different from vs in dealing with virtual inheritance. The virtual function table of the derived class is merged with the virtual base class table. // GCC compiler -- Which of the following is a single virtual inhe

function return value The return value type must be the same as the return type of the function For the main function, the return value must be of type int. In most systems, the return value of the main function is a status indicator. A return value of 0 indicates that the main function completed successfully, and a non-zero return indicates an error occurred. GNU compiler command VI: New file, I: Edit; Esc exit edit; Wq/zz: Save an

filed object and initializes it accordingly. Lines 29th and 30 Add this object to the single linked list pointed to by Rty->flds.struct packet{int Len;Char data[];};The Lookupfield function in line 33rd of Figure 4.4.11 is used to retrieve the existence of a member field named ID in the Structrecordtype object, when the member field has no name and its type is also a nameless struct, we need to call the Lookupfield function recursively in line 40th at this time. "Nameless struct", which is suit

I heard that now my classmates in the University of general use of the compiler is VC6.0, in order to facilitate their advice, so I just started to choose VC6.0 to learn. But the installation of the process has a variety of problems, I do not want to use the green version, so finally chose the installation of the most convenient dev-c++. I want to start by analyzing someone else's code. The classmate recomm