VC++深入详解之基于UDP的网络应用程序的编写_vc++udp程序设计教学-优快云博客

本文链接：https://blog.youkuaiyun.com/gwindm/article/details/3945841

本文提供了一个基于UDP协议的简单服务器与客户端通信程序实例。该示例使用Winsock库在Windows平台上实现，展示了如何创建服务器接收消息及客户端发送消息的基本流程。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

服务器端

#pragma comment (lib,"ws2_32.lib") #include <WINSOCK2.H> #include <stdio.h> void main() { WORD wVersionRequested; WSADATA wsaData; int err; wVersionRequested = MAKEWORD(1, 1); err = WSAStartup( wVersionRequested, &wsaData); if(err != 0) { return; } if(LOBYTE( wsaData.wVersion) != 1 || HIBYTE(wsaData.wVersion) != 1) { WSACleanup(); return; } SOCKET sockSrv = socket(AF_INET, SOCK_DGRAM, 0); SOCKADDR_IN addrSrv; addrSrv.sin_addr.S_un.S_addr = htonl(INADDR_ANY); addrSrv.sin_family = AF_INET; addrSrv.sin_port = htons(6000); bind(sockSrv, (SOCKADDR *)&addrSrv, sizeof(SOCKADDR)); SOCKADDR_IN addrClient; int len = sizeof(SOCKADDR); char recvBuf[100]; recvfrom(sockSrv, recvBuf, 100, 0, (SOCKADDR*)&addrClient, &len); printf("%s/n", recvBuf); closesocket(sockSrv); WSACleanup(); }

客户端

#pragma comment (lib,"ws2_32.lib") #include <WINSOCK2.H> #include <stdio.h> void main() { WORD wVersionRequested; WSADATA wsaData; int err; wVersionRequested = MAKEWORD(1,1); err = WSAStartup(wVersionRequested, &wsaData); if(err != 0) { return; } if(LOBYTE(wsaData.wVersion) != 1 || HIBYTE(wsaData.wVersion) != 1) { WSACleanup(); return; } SOCKET sockClient = socket(AF_INET, SOCK_DGRAM, 0); SOCKADDR_IN addrSrv; addrSrv.sin_addr.S_un.S_addr = inet_addr("127.0.0.1"); addrSrv.sin_family = AF_INET; addrSrv.sin_port = htons(6000); sendto(sockClient, "Hello", strlen("Hello") + 1, 0, (SOCKADDR *)&addrSrv, sizeof(SOCKADDR)); closesocket(sockClient); WSACleanup(); }