Error Lnk2019 Unresolved External Symbol _wsastartup
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C++ Error Lnk2019 Unresolved External Symbol
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Error Lnk2019 Unresolved External Symbol Winmain@16 Referenced In Function ___tmaincrtstartup
programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Unresolved external symbol LNK2019 up vote 16 down vote favorite 4 First of all, I know this question is all over this site but I have looked at almost all of them and can't seem to find out what error lnk2019 unresolved external symbol visual studio 2010 is wrong. This is in VS 2012. Thanks. //Socket.h #pragma once #include #include using namespace std; const int STRLEN = 256; class Socket { protected: WSADATA wsaData; SOCKET mySocket; SOCKET myBackup; SOCKET acceptSocket; sockaddr_in myAddress; public: Socket(); ~Socket(); bool SendData( char* ); bool RecvData( char*, int ); void CloseConnection(); void GetAndSendMessage(); }; class ServerSocket : public Socket { public: void Listen(); void Bind( int port ); void StartHosting( int port ); }; class ClientSocket : public Socket { public: void ConnectToServer( const char *ipAddress, int port ); }; Here's Socket.cpp //Socket.cpp #include "stdafx.h" #include "Socket.h" Socket::Socket() { if( WSAStartup( MAKEWORD(2, 2), &wsaData ) != NO_ERROR ) { cerr<<"Socket Initialization: Error with WSAStartup\n"; system("pause"); WSACleanup(); exit(10); } //Create a socket mySocket = socket( AF_INET, SOCK_STREAM, IPPROTO_TCP ); if ( mySocket == INVALID_SOCKET ) { cerr<<"Socket Initialization: Error creating socket"<here for a quick overview of the site Help Center Detailed answers to any
Error Lnk2019 Unresolved External Symbol Public __thiscall Referenced In Function _main
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Error Lnk2019 Unresolved External Symbol Void __cdecl
of this site About Us Learn more about Stack Overflow the company Business Learn more about error lnk2019 unresolved external symbol main referenced in function __tmaincrtstartup hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow http://stackoverflow.com/questions/16948064/unresolved-external-symbol-lnk2019 is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up lnk2019 visual studio error up vote 3 down vote favorite I am trying to make a simple UDP socket class to do some talking between a c++ program and a http://stackoverflow.com/questions/15062654/lnk2019-visual-studio-error java program so I'm trying to make a socket class that handles all the UDP transmission but I can't get the program to compile because I get about 8 lnk2019 errors and I have no idea what they even mean. I mainly work in Java and only use c++ when I have to lol. I have 3 files the socket header and code. Also the Udp Socket code is from rFactor-Nesim so the socket code isn't written by me. UdpSocket.cpp #include "UdpSocket.hpp" #include UdpSocket::UdpSocket(const char* host, int port) : mHost(host), mPort(port) { } UdpSocket::~UdpSocket(void) { } void UdpSocket::Open() { if(WSAStartup(MAKEWORD(2, 0), &mWinsockData) != 0) fprintf(stderr, "WSAStartup() failed"); if ((mSocket = socket(AF_INET, SOCK_DGRAM, 0)) < 0) perror("socket() failed"); memset(&mSocketAddress, 0, sizeof(mSocketAddress)); mSocketAddress.sin_family = AF_INET; mSocketAddress.sin_addr.s_addr = inet_addr(mHost); mSocketAddress.sin_port = htons(mPort); } void UdpSocket::Close() { closesocket(mSocket); WSACleanup(); } void UdpSocket::Send(char* str, size_t length) { size_t result = sendto(mSocket, str, length, 0, (struct sockaddr *) &mSocketAddress, sizeof(mSocketAddress
Windows Desktop Development > Visual C++ Question 0 Sign in to vote id like to start off with i have no idea what i am doing i https://social.msdn.microsoft.com/Forums/vstudio/en-US/a7ab9564-04e6-43b0-a28d-fb180a4dbbe6/unresolved-external-symbols?forum=vcgeneral got this code from a winsock tutorial to give me a base structure for 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 get this to compile) anyway here is my code #include
#include
#include
#define NETWORK_ERROR -1 #define NETWORK_OK 0 void error lnk2019 ReportError(int, const char *); int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpszArgs, int nWinMode); int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpszArgs, int nWinMode) { WORD sockVersion; WSADATA wsaData; int nret; sockVersion = MAKEWORD(1, 1); // Initialize Winsock as before WSAStartup(sockVersion, &wsaData); // Store information about the server LPHOSTENT hostEntry; hostEntry = gethostbyname("http://by124w.bay124.mail.live.com"); // Specifying the server by its error lnk2019 unresolved name; // another option is gethostbyaddr() (see below) if (!hostEntry) { nret = WSAGetLastError(); ReportError(nret, "gethostbyname()"); // Report the error as before WSACleanup(); return NETWORK_ERROR; } // Create the socket SOCKET theSocket; theSocket = socket(AF_INET, // Go over TCP/IP SOCK_STREAM, // This is a stream-oriented socket IPPROTO_TCP); // Use TCP rather than UDP if (theSocket == INVALID_SOCKET) { nret = WSAGetLastError(); ReportError(nret, "socket()"); WSACleanup(); return NETWORK_ERROR; } // Fill a SOCKADDR_IN struct with address information SOCKADDR_IN serverInfo; serverInfo.sin_family = AF_INET; // At this point, we've successfully retrieved vital information about the server, // including its hostname, aliases, and IP addresses. Wait; how could a single // computer have multiple addresses, and exactly what is the following line doing? // See the explanation below. serverInfo.sin_addr = *((LPIN_ADDR)*hostEntry->h_addr_list); serverInfo.sin_port = htons(80); // Change to network-byte order and // insert into port field // Connect to the server nret = connect(theSocket, (LPSOCKADDR)&serverInfo, sizeof(struct sockaddr)); if (nret == SOCKET_ERROR) { nret = WSAGetLastError(); ReportError(nret, "connect()"); WSACleanup(); return NETWORK_ERROR; } // Successfully connected! // Send/receive, then cleanup: closesocket(theSocket); WSACleanup(); } void ReportError(int errorCode, const char *wh