Error Lnk2019 Unresolved External Symbol Wsagetlasterror
Contents |
here for a quick overview of the site Help Center Detailed answers to error lnk2019 unresolved external symbol __declspec(dllimport) any questions you might have Meta Discuss the workings and c++ error lnk2019 unresolved external symbol policies of this site About Us Learn more about Stack Overflow the company Business Learn error lnk2019 unresolved external symbol public more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community
Error Lnk2019 Unresolved External Symbol Winmain@16 Referenced In Function ___tmaincrtstartup
Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up LNK2019: Unresolved external symbol up vote 4 down vote favorite I've seen plenty of other questions like this but I just couldn't figure this problem out with error lnk2019 unresolved external symbol visual studio 2010 the help of them. I've understood that it's a linking problem but from what I can see, I've got the linking straightened out. I'm writing a chat server/client (with the help of this article). I've defined a class to hold the server functions and have a header-file that handles all the includes. This is the header file: #include
Windows Desktop Development > Visual C++ Question 0 Sign in to vote id like to start error lnk2019 unresolved external symbol public __thiscall referenced in function _main off with i have no idea what i am doing
Error Lnk2019 Unresolved External Symbol Void __cdecl
i got this code from a winsock tutorial to give me a base structure for
Error Lnk2019 Unresolved External Symbol Main Referenced In Function __tmaincrtstartup
my program i am trying to connect to a pop3 server and check how many emails there are in an acount (irrelavant because i cant even http://stackoverflow.com/questions/7232674/lnk2019-unresolved-external-symbol get this to compile) anyway here is my code #include
Primary: Sky Slate Blackcurrant Orchid Cranberry Strawberry Orange Banana Apple Chocolate Marble Black Custom Secondary: Sky http://www.rohitab.com/discuss/topic/34167-error-lnk2019-unresolved-external-symbol-winsock-c/ Slate Blackcurrant Orchid Cranberry Strawberry Orange Banana Apple Chocolate Marble http://www.winsocketdotnetworkprogramming.com/winsock2programming/winsock2advancedcode1a.html Black Custom Pattern: None Waves Noise Grid Shattered Paper Wood Rockface Leather Honey Vertical Triangles Maze rohitab.com - Forums Programming Programming Rules, Guidelines & FAQ View New Content Javascript Disabled Detected You currently have javascript disabled. Several functions may not error lnk2019 work. Please re-enable javascript to access full functionality. error LNK2019: unresolved external symbol - Winsock C++ Started By pǝsnɟuoɔ, May 03 2009 10:31 PM Please log in to reply 9 replies to this topic #1 pǝsnɟuoɔ Posted 03 May 2009 - 10:31 PM pǝsnɟuoɔ Junior Member Members 150 posts Reputation: 1 error lnk2019 unresolved When i compile i get this error:1>Linking...1>server.obj : error LNK2019: unresolved external symbol __imp__ntohs@4 referenced in function "void __cdecl acceptingThreadProcedure(int *)" (?acceptingThreadProcedure@@YAXPAH@Z)1>server.obj : error LNK2019: unresolved external symbol _inet_ntop@16 referenced in function "void __cdecl acceptingThreadProcedure(int *)" (?acceptingThreadProcedure@@YAXPAH@Z)1>server.obj : error LNK2019: unresolved external symbol __imp__accept@12 referenced in function "void __cdecl acceptingThreadProcedure(int *)" (?acceptingThreadProcedure@@YAXPAH@Z)1>server.obj : error LNK2019: unresolved external symbol __imp__ntohl@4 referenced in function _main1>server.obj : error LNK2019: unresolved external symbol __imp__closesocket@4 referenced in function _main1>server.obj : error LNK2019: unresolved external symbol __imp__WSAGetLastError@0 referenced in function _main1>server.obj : error LNK2019: unresolved external symbol __imp__recv@16 referenced in function _main1>server.obj : error LNK2019: unresolved external symbol __imp__select@20 referenced in function _main1>server.obj : error LNK2019: unresolved external symbol __imp__listen@8 referenced in function "int __cdecl startupServer(class std::basic_string
Internet Addresses Some Note inet_ntoa() Function InetNtop() Function InetPton() Function Byte Ordering Creating a Socket Connection-Oriented Communication Server API Functions Binding, bind() Listening, listen() Accepting Connections, accept() Addressing a Protocol This chapter is limited to describing how to make fundamental Winsock calls to set up communication using the Internet Protocol (IP) because most Winsock applications developed today use it because it is widely available due to the popularity of the Internet. However, Winsock is a protocol-independent interface. Also, our discussion of IP in this chapter is limited to briefly describing IP version 4 (IPv4). Throughout the remainder of this chapter, we will demonstrate the basics of how to set up Winsock communication using the IPv4 protocol. IP is widely available on most computer operating systems and can be used on most local area networks (LANs), such as a small network in your office, and on wide area networks (WANs), such as the Internet. By design, IP is a connectionless protocol and doesn't guarantee data delivery. Two higher-level protocols, Transmission Control Protocol (TCP) and User Datagram Protocol (UDP) are used for connection-oriented and connectionless data communication over IP, which we will describe later. Both TCP and UDP use IP for data transmission and are normally referred to as TCP/IP and UDP/IP. To use IPv4 in Winsock, you need understand how to address IPv4. Addressing IPv4 In IPv4, computers are assigned an address that is represented as a 32-bit quantity. When a client wants to communicate with a server through TCP or UDP, it must specify the server's IP address along with a service port number. Also, when servers want to listen for incoming client requests, they must specify an IP address and a port number. In Winsock, applications specify IP addresses and service port information through the SOCKADDR_IN structure, which is defined as: struct sockaddr_in { short sin_family; u_short sin_port; struct in_addr sin_addr; char sin_zero[8]; }; The sin_family field must be set to AF_INET, which tells Winsock we are using the IP address family. The sin_port field defines which TCP or UDP communication port will be used to identify a server service. Applications should be particularly careful in choosing a port because some of the available port numbers are reserved for well-known services, such