MinGW WinSockets 编程

旧城等待， 2022-08-03 11:47 197阅读 0赞

前言：

大一的时候一个学长给我推荐MinGW(Minimalist GNUfor Windows) Developer Studio，后来就一直用了下去，感觉比VC++和DEV C好用，比VS更轻量级吧。

最近需要写一个简单的winsockets Client 来测试服务器，发现编译问题。

客户端代码：

#include <iostream>
    #include <winsock2.h>
    using namespace std;
    #pragma comment(lib, "ws2_32.lib")
    #define PORT 5154
    #define IP_ADDRESS "127.0.0.1"
    
    int main(int argc, char * argv[])
    {
    	WSADATA Ws;
    	SOCKET ClientSocket;
    	struct sockaddr_in ServerAddr;
    	int Ret = 0;
    	int AddrLen = 0;
    	HANDLE hThread = NULL;
    	char SendBuffer[MAX_PATH];
    	if (WSAStartup(MAKEWORD(2, 2), &Ws) != 0)
    	{
    		cout << "Init Windows Socket Failed::" << GetLastError() << endl;
    		return -1;
    	}
    	
    	ClientSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    	if (ClientSocket == INVALID_SOCKET)
    	{
    		cout << "Create Socket Failed::" << GetLastError() << endl;
    		return -1;
    	}
    
    	ServerAddr.sin_family = AF_INET;
    	ServerAddr.sin_addr.s_addr = inet_addr(IP_ADDRESS);
    	ServerAddr.sin_port = htons(PORT);
    	memset(ServerAddr.sin_zero, 0x00, 8);
    
    	Ret = connect(ClientSocket, (struct sockaddr*)&ServerAddr, sizeof(ServerAddr));
    	if (Ret == SOCKET_ERROR)
    	{
    		cout << "Connect Error::" << GetLastError() << endl;
    		return -1;
    	}
    	while (true)
    	{
    		cout << "Please input Message:"<<endl;
    		cin.getline(SendBuffer, sizeof(SendBuffer));
    		Ret = send(ClientSocket, SendBuffer, (int)strlen(SendBuffer), 0);
    		if (Ret == SOCKET_ERROR)
    		{
    			cout << "Send Info Error::" << GetLastError() << endl;
    			break;
    		}
    	}
    
    	closesocket(ClientSocket);
    	WSACleanup();
    
    	return 0;
    }

简单分析一下代码：

1.WSAStartup完成Winsocket服务初始化

2.创建套接字

3.设置服务器网络参数

4.发起连接

5.发送数据

6.关闭套接字关闭Winsockets服务

这里出现的问题，在MinGW Studio下编译通过但是在Link（链接）的时候会报错：

undefined reference to \`WSAStartup@8'

undefined reference to xxxxxxx

网上有这样的**解决方案**：

在代码前面加上：