继续:从套接字编程中调用C函数 [英] Continue: Call a C function from socket programming

问题描述

这是"server.cpp"文件中的测试列表"功能.

this is the "testlist"function which is in "server.cpp"file.

#include "stdafx.h"
#include "WinSock2Server.h"
//YLN added 2010-09-25
#include <iostream>
#include <string>
using namespace std;
#include "router.h"

// Ended
//YLN added 2010-09-25
template <typename T>
void testList(Router < T > &listObject, const string &typeName)
{
    cout <<" Testing a list of " << typeName << " values \n";
	instructions ();
	int choice;
	T value;
	do
	{
      cout << "?";
	  cin >> choice;
	  switch (choice)
	  {
	  case 1:
		  cout << "enter" << typeName <<":";
		  cin >> value;
		  listObject.Register(value);
		  listObject.print();
		  break;
	  case 2:
	      cout << "enter" << typeName <<":";
		  cin >> value;
		  listObject.sendRegistration(value);
		  listObject.print();
		  break;	 
      case 3:
	      if (listObject.sendRegistrationCancellation(value))
			  cout << value <<" removed from list\n";
		  listObject.print();
		  break;	 

	  case 4:
	      if (listObject.sendCancellationConfirmation(value))
			  cout << value <<" removed from list\n";
		  listObject.print();
		  break;	 
        
	  }
	} while (choice != 5);
	cout << "End list test \n\n";
}
void instructions ()
{
	cout << "enter one of the following:\n"
		<< " 1 to register node to the list\n"
		<< " 2 to sendRegistration to the node \n"
		<<" 3 to sendRegistrationCancellation to the list\n"
		<<"4 to end list processing \n";
}
	//Ended
int _tmain(int argc, _TCHAR* argv[])
{
	        Router <int > integerRouter;
			testList ( integerRouter, "integer");
			Router < double > doubleRouter;
			testList ( doubleRouter, "double");
	WinSock2Server *srv = new WinSock2Server();
	srv->STEP1_InitializeWinsock();
	srv->STEP2_CreateAndBindSocket();
	srv->STEP3_ListenOnSocket();
	srv->STEP4_AcceptingConnection();
	srv->STEP6_Disconnect();	
	 //
	
	return 0;
}

错误如下:

Got errors as:

1>c:\documents and settings\lina\desktop\winsock2-basicclientserver1\winsock2-basicclientserver\winsock2server\server\winsock2server.cpp(134) : error C3861: 'testList': identifier not found
1>c:\documents and settings\lina\desktop\winsock2-basicclientserver1\winsock2-basicclientserver\winsock2server\server\winsock2server.cpp(137) : error C3861: 'testList': identifier not found

根据显示的错误，编译器无法识别它，但我不知道如何识别它.

According to the errors displayed, the compiler does not recognise it, but i donot know how to make it recognise.

推荐答案

仅作记录，以下缩写形式为您的代码编译成功:

Just for the record, the following shortened form of your code compiles successfully:

using namespace std;

template <typename T>
struct Router
{
    T rval;
};
// Ended
//YLN added 2010-09-25
template <typename T>
void testList(Router < T > &listObject, const string &typeName)
{
    cout <<" Testing a list of " << typeName << " values \n";
    cout << "End list test \n\n";
};
//Ended
int _tmain()
{
//  int integerRouter;
            Router <int > integerRouter;
            testList ( integerRouter, "integer");
            Router < double > doubleRouter;
            testList ( doubleRouter, "double");
    return 0;
}

检查以下各项是否有效-

Check if the following work -

testList<int>(integerRouter, "integer");
testList<double>(doubleRouter, "double");

linayang写道:

linayang wrote:

这是服务器"中的测试列表"功能. cpp文件.

this is the "testlist"function which is in "server.cpp"file.

为什么它没有包含在包含文件中?除非您使用的是基于EDG的编译器，否则您将无法从源文件中导出模板定义，而只能将原型包含在某个地方.无论调用什么测试列表，都需要查看它的完整定义-在您的情况下，需要通过包含或批量剪切和粘贴将其引入winsock2server.cpp中.

干杯，

灰

PS:实际上，当我在谈论这个话题时...

路由器定义也必须对您正在其中编译testList的任何对象可见.

Why isn''t it in an include file? Unless you''re using a compiler based on EDG you can''t export a template definition from a source file and just include the prototype somewhere. Whatever calls testlist needs to see it''s full definition - in your case it needs to be introduced into winsock2server.cpp, either by including it or wholesale cut-and-paste.

Cheers,

Ash

PS: Actually, while I''m on the subject...

The router definition needs to be visible to whatever you''re compiling testList in as well.

这篇关于继续:从套接字编程中调用C函数的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！