服务器端代码:#define _WINSOCK_DEPRECATED_NO_WARNINGS #include <stdio.h> #include <Winsock2.h> #ifndef MSG_NOSIGNAL #define MSG_NOSIGNAL 0 #endif #pragma comment(lib,"ws2_32.lib") int main() { WORD wVersionRequested; WSADATA wsaData; int err; wVersionRequested = MAKEWORD(2, 2); err = WSAStartup(wVersionRequested, &wsaData); if (err != 0) { return 1; } if (LOBYTE(wsaData.wVersion) != 2 || HIBYTE(wsaData.wVersion) != 2) { WSACleanup(); return 1; } SOCKET sockSrv = socket(AF_INET, SOCK_STREAM, 0); int optval = 1; setsockopt(sockSrv, SOL_SOCKET, SO_REUSEADDR, (const char*)&optval, sizeof(optval)); 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)); listen(sockSrv, 5); SOCKADDR_IN addrClient; int len = sizeof(SOCKADDR); while (1) { SOCKET sockConn = accept(sockSrv, (SOCKADDR*)&addrClient, &len); char sendBuf[50]; printf(sendBuf, "Welcome %s to here!", inet_ntoa(addrClient.sin_addr)); send(sockConn, sendBuf, strlen(sendBuf) + 1, MSG_NOSIGNAL); char recvBuf[50]; recv(sockConn, recvBuf, 50, 0); printf("%s\n", recvBuf); closesocket(sockConn); } WSACleanup(); return 0;}

时间: 2024-04-27 19:21:24 浏览: 9
这段代码是一个简单的 TCP 服务器端,它监听本地 6000 端口的连接请求,并对每个连接请求发送欢迎信息,然后等待客户端发送数据,接收客户端发送的数据并打印出来,最后关闭连接。 客户端代码:#define _WINSOCK_DEPRECATED_NO_WARNINGS #include <stdio.h> #include <Winsock2.h> #ifndef MSG_NOSIGNAL #define MSG_NOSIGNAL 0 #endif #pragma comment(lib,"ws2_32.lib") int main() { WORD wVersionRequested; WSADATA wsaData; int err; wVersionRequested = MAKEWORD(2, 2); err = WSAStartup(wVersionRequested, &wsaData); if (err != 0) { return 1; } if (LOBYTE(wsaData.wVersion) != 2 || HIBYTE(wsaData.wVersion) != 2) { WSACleanup(); return 1; } SOCKET sockClient = socket(AF_INET, SOCK_STREAM, 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); connect(sockClient, (SOCKADDR*)&addrSrv, sizeof(SOCKADDR)); char recvBuf[50]; recv(sockClient, recvBuf, 50, 0); printf("%s\n", recvBuf); char sendBuf[50]; sprintf(sendBuf, "Hello, Server!"); send(sockClient, sendBuf, strlen(sendBuf) + 1, MSG_NOSIGNAL); closesocket(sockClient); WSACleanup(); return 0;} 这段代码是一个简单的 TCP 客户端,它连接本地 6000 端口的服务器端,并发送一条问候信息,然后等待服务器端回复,接收服务器端回复并打印出来,最后关闭连接。 当客户端运行后,服务器端会接收到连接请求,并发送欢迎信息给客户端,然后等待客户端发送数据。当客户端发送数据后,服务器端会接收到数据并打印出来。最后客户端和服务器端都关闭连接。

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客户端代码 #define _WINSOCK_DEPRECATED_NO_WARNINGS #include <stdio.h> #include <Winsock2.h> #ifndef MSG_NOSIGNAL #define MSG_NOSIGNAL 0 #endif #pragma comment(lib,"ws2_32.lib") int main() { WORD wVersionRequested; WSADATA wsaData; int err; wVersionRequested = MAKEWORD(1, 1); err = WSAStartup(wVersionRequested, &wsaData); if (err != 0) { return -1; } if (LOBYTE(wsaData.wVersion) != 1 || HIBYTE(wsaData.wVersion) != 1) { WSACleanup(); return -1; } SOCKET sockClient = socket(AF_INET, SOCK_STREAM, 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); connect(sockClient, (SOCKADDR*)&addrSrv, sizeof(SOCKADDR)); send(sockClient, "hello\0", strlen("hello") + 1, 0); char recvBuf[50]; recv(sockClient, recvBuf, 50, 0); printf("%s\n", recvBuf); closesocket(sockClient); WSACleanup(); return 0;} 服务器端:#define _WINSOCK_DEPRECATED_NO_WARNINGS #include <stdio.h> #include <Winsock2.h> #ifndef MSG_NOSIGNAL #define MSG_NOSIGNAL 0 #endif #pragma comment(lib,"ws2_32.lib") int main() { WORD wVersionRequested; WSADATA wsaData; int err; wVersionRequested = MAKEWORD(2, 2); err = WSAStartup(wVersionRequested, &wsaData); if (err != 0) { return 1; } if (LOBYTE(wsaData.wVersion) != 2 || HIBYTE(wsaData.wVersion) != 2) { WSACleanup(); return 1; } SOCKET sockSrv = socket(AF_INET, SOCK_STREAM, 0); int optval = 1; setsockopt(sockSrv, SOL_SOCKET, SO_REUSEADDR, (const char*)&optval, sizeof(optval)); 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)); listen(sockSrv, 5); SOCKADDR_IN addrClient; int len = sizeof(SOCKADDR); while (1) { SOCKET sockConn = accept(sockSrv, (SOCKADDR*)&addrClient, &len); char sendBuf[50]; printf(sendBuf, "Welcome %s to here!", inet_ntoa(addrClient.sin_addr)); send(sockConn, sendBuf, strlen(sendBuf) + 1, MSG_NOSIGNAL); char recvBuf[50]; recv(sockConn, recvBuf, 50, 0); printf("%s\n", recvBuf); closesocket(sockConn); } WSACleanup(); return 0;} 如何修改代码改成可以一直聊天的 不要预输入进去的 要我自己在客户端进行打字操作

客户端代码#define _WINSOCK_DEPRECATED_NO_WARNINGS #define _CRT_SECURE_NO_WARNINGS #include <stdio.h> #include <stdlib.h> #include <string.h> #include <WinSock2.h> #ifndef MSG_NOSIGNAL #define MSG_NOSIGNAL 0 #endif #pragma comment(lib,"ws2_32.lib") DWORD WINAPI ReceiveThread(LPVOID lpParam) { SOCKET sockClient = (SOCKET)lpParam; char recvBuf[50]; while (1) { // 接收服务器的消息并打印出来 int ret = recv(sockClient, recvBuf, 50, 0); if (ret <= 0) { break; } printf("Received from server: %s\n", recvBuf); } return 0; } int main() { WORD wVersionRequested; WSADATA wsaData; int err; wVersionRequested = MAKEWORD(1, 1); err = WSAStartup(wVersionRequested, &wsaData); if (err != 0) { return -1; } if (LOBYTE(wsaData.wVersion) != 1 || HIBYTE(wsaData.wVersion) != 1) { WSACleanup(); return -1; } // 创建套接字并连接到服务器 SOCKET sockClient = socket(AF_INET, SOCK_STREAM, 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); connect(sockClient, (SOCKADDR*)&addrSrv, sizeof(SOCKADDR)); // 创建新线程来接收服务器的消息 HANDLE hThread = CreateThread(NULL, 0, ReceiveThread, &sockClient, 0, NULL); char sendBuf[50]; while (1) { // 读取用户输入的消息并发送给服务器 printf("Input message to send: "); fgets(sendBuf, 50, stdin); send(sockClient, sendBuf, strlen(sendBuf) + 1, 0); } // 关闭线程句柄 CloseHandle(hThread); closesocket(sockClient); WSACleanup(); return 0; }

#define _WINSOCK_DEPRECATED_NO_WARNINGS #define _CRT_SECURE_NO_WARNINGS #include <stdio.h> #include <stdlib.h> #include <string.h> #include <WinSock2.h> #ifndef MSG_NOSIGNAL #define MSG_NOSIGNAL 0 #endif #pragma comment(lib, "ws2_32.lib") #define MAX_CLIENTS 10 #define MAX_BUFFER_SIZE 50 SOCKET clientSockets[MAX_CLIENTS]; // 客户端套接字数组 int numClients = 0; // 客户端数量 DWORD WINAPI ClientThread(LPVOID lpParam) { SOCKET clientSocket = *(SOCKET*)lpParam; char recvBuf[MAX_BUFFER_SIZE]; while (1) { int ret = recv(clientSocket, recvBuf, MAX_BUFFER_SIZE, 0); if (ret <= 0) { break; } // 将消息广播给所有客户端 for (int i = 0; i < numClients; i++) { send(clientSockets[i], recvBuf, strlen(recvBuf) + 1, MSG_NOSIGNAL); } } // 客户端断开连接,从套接字数组中移除 for (int i = 0; i < numClients; i++) { if (clientSockets[i] == clientSocket) { for (int j = i; j < numClients - 1; j++) { clientSockets[j] = clientSockets[j + 1]; } break; } } numClients--; closesocket(clientSocket); return 0; } int main() { WORD wVersionRequested; WSADATA wsaData; int err; wVersionRequested = MAKEWORD(1, 1); err = WSAStartup(wVersionRequested, &wsaData); if (err != 0) { return -1; } if (LOBYTE(wsaData.wVersion) != 1 || HIBYTE(wsaData.wVersion) != 1) { WSACleanup(); return -1; } SOCKET sockSrv = socket(AF_INET, SOCK_STREAM, 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)); listen(sockSrv, 5); printf("服务器已启动,等待客户端连接...\n"); while (1) { SOCKADDR_IN addrClient; int len = sizeof(SOCKADDR); SOCKET sockConn = accept(sockSrv, (SOCKADDR*)&addrClient, &len); printf("客户端 %s:%d 已连接\n", inet_ntoa(addrClient.sin_addr), ntohs(addrClient.sin_port)); // 将新的客户端套接字添加到数组中 clientSockets[numClients++] = sockConn; // 创建线程处理客户端消息 HANDLE hThread = CreateThread(NULL, 0, ClientThread, &sockConn, 0, NULL); CloseHandle(hThread); } closesocket(sockSrv); WSACleanup(); return 0; }

服务器端代码#define _WINSOCK_DEPRECATED_NO_WARNINGS #define _CRT_SECURE_NO_WARNINGS #include <stdio.h> #include <stdlib.h> #include <string.h> #include <WinSock2.h> #ifndef MSG_NOSIGNAL #define MSG_NOSIGNAL 0 #endif #pragma comment(lib,"ws2_32.lib") SOCKET g_clientSockets[10]; int g_clientCount = 0; DWORD WINAPI ClientThread(LPVOID lpParam) { SOCKET clientSocket = (SOCKET)lpParam; char recvBuf[50], sendBuf[50]; while (1) { // 接收客户端消息并处理 int ret = recv(clientSocket, recvBuf, 50, 0); if (ret <= 0) { break; } printf("Received message from client: %s\n", recvBuf); // 转发消息给所有客户端 for (int i = 0; i < g_clientCount; i++) { if (g_clientSockets[i] != clientSocket) { send(g_clientSockets[i], recvBuf, strlen(recvBuf) + 1, 0); } } } // 关闭客户端套接字 closesocket(clientSocket); // 从全局变量中移除该客户端套接字 for (int i = 0; i < g_clientCount; i++) { if (g_clientSockets[i] == clientSocket) { g_clientCount--; memmove(&g_clientSockets[i], &g_clientSockets[i + 1], (g_clientCount - i) * sizeof(SOCKET)); break; } } return 0; } int main() { WORD wVersionRequested; WSADATA wsaData; int err; wVersionRequested = MAKEWORD(1, 1); err = WSAStartup(wVersionRequested, &wsaData); if (err != 0) { return -1; } if (LOBYTE(wsaData.wVersion) != 1 || HIBYTE(wsaData.wVersion) != 1) { WSACleanup(); return -1; } // 创建套接字并绑定到本地地址 SOCKET sockSrv = socket(AF_INET, SOCK_STREAM, 0); SOCKADDR_IN addrSrv; addrSrv.sin_family = AF_INET; addrSrv.sin_addr.S_un.S_addr = htonl(INADDR_ANY); addrSrv.sin_port = htons(6000); bind(sockSrv, (SOCKADDR*)&addrSrv, sizeof(SOCKADDR)); // 开始监听客户端连接请求 listen(sockSrv, 5); while (1) { // 接受客户端连接并处理消息 SOCKADDR_IN addrClient; int len = sizeof(SOCKADDR); SOCKET sockConn = accept(sockSrv, (SOCKADDR*)&addrClient, &len); // 将新连接的客户端套接字加入全局变量 g_clientSockets[g_clientCount++] = sockConn; // 创建新线程来处理该客户端的消息 HANDLE hThread = CreateThread(NULL, 0, ClientThread, &sockConn, 0, NULL); // 关闭线程句柄 CloseHandle(hThread); } closesocket(sockSrv); WSACleanup(); return 0; }

这是服务端代码#define _WINSOCK_DEPRECATED_NO_WARNINGS #define _CRT_SECURE_NO_WARNINGS #include <stdio.h> #include <stdlib.h> #include <string.h> #include <WinSock2.h> #ifndef MSG_NOSIGNAL #define MSG_NOSIGNAL 0 #endif #pragma comment(lib,"ws2_32.lib") SOCKET g_clientSockets[10]; int g_clientCount = 0; DWORD WINAPI ClientThread(LPVOID lpParam) { SOCKET clientSocket = (SOCKET)lpParam; char recvBuf[50], sendBuf[50]; while (1) { // 接收客户端消息并处理 int ret = recv(clientSocket, recvBuf, 50, 0); if (ret <= 0) { break; } printf("Received message from client: %s\n", recvBuf); // 转发消息给所有客户端 for (int i = 0; i < g_clientCount; i++) { if (g_clientSockets[i] != clientSocket) { send(g_clientSockets[i], recvBuf, strlen(recvBuf) + 1, 0); } } } // 关闭客户端套接字 closesocket(clientSocket); // 从全局变量中移除该客户端套接字 for (int i = 0; i < g_clientCount; i++) { if (g_clientSockets[i] == clientSocket) { g_clientCount--; memmove(&g_clientSockets[i], &g_clientSockets[i + 1], (g_clientCount - i) * sizeof(SOCKET)); break; } } return 0; } int main() { WORD wVersionRequested; WSADATA wsaData; int err; wVersionRequested = MAKEWORD(1, 1); err = WSAStartup(wVersionRequested, &wsaData); if (err != 0) { return -1; } if (LOBYTE(wsaData.wVersion) != 1 || HIBYTE(wsaData.wVersion) != 1) { WSACleanup(); return -1; } // 创建套接字并绑定到本地地址 SOCKET sockSrv = socket(AF_INET, SOCK_STREAM, 0); SOCKADDR_IN addrSrv; addrSrv.sin_family = AF_INET; addrSrv.sin_addr.S_un.S_addr = htonl(INADDR_ANY); addrSrv.sin_port = htons(6000); bind(sockSrv, (SOCKADDR*)&addrSrv, sizeof(SOCKADDR)); // 开始监听客户端连接请求 listen(sockSrv, 5); while (1) { // 接受客户端连接并处理消息 SOCKADDR_IN addrClient; int len = sizeof(SOCKADDR); SOCKET sockConn = accept(sockSrv, (SOCKADDR*)&addrClient, &len); // 将新连接的客户端套接字加入全局变量 g_clientSockets[g_clientCount++] = sockConn; // 创建新线程来处理该客户端的消息 HANDLE hThread = CreateThread(NULL, 0, ClientThread, &sockConn, 0, NULL); // 关闭线程句柄 CloseHandle(hThread); } closesocket(sockSrv); WSACleanup(); return 0; }

你刚刚给我修改的服务器端和客户端的代码后为什么服务器端不显示任何消息 服务器端代码 #define _WINSOCK_DEPRECATED_NO_WARNINGS#include <stdio.h>#include <Winsock2.h>#ifndef MSG_NOSIGNAL#define MSG_NOSIGNAL 0#endif#pragma comment(lib,"ws2_32.lib")int main() { WORD wVersionRequested; WSADATA wsaData; int err; wVersionRequested = MAKEWORD(2, 2); err = WSAStartup(wVersionRequested, &wsaData); if (err != 0) { return 1; } if (LOBYTE(wsaData.wVersion) != 2 || HIBYTE(wsaData.wVersion) != 2) { WSACleanup(); return 1; } // 创建套接字并绑定到本地地址和端口 SOCKET sockSrv = socket(AF_INET, SOCK_STREAM, 0); int optval = 1; setsockopt(sockSrv, SOL_SOCKET, SO_REUSEADDR, (const char*)&optval, sizeof(optval)); 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)); // 监听连接请求并接受客户端连接 listen(sockSrv, 5); SOCKADDR_IN addrClient; int len = sizeof(SOCKADDR); SOCKET sockConn; fd_set fdReads; while (1) { // 使用 select() 函数实现非阻塞接收客户端连接 FD_ZERO(&fdReads); FD_SET(sockSrv, &fdReads); int ret = select(sockSrv + 1, &fdReads, NULL, NULL, NULL); if (ret < 0) { break; } if (FD_ISSET(sockSrv, &fdReads)) { sockConn = accept(sockSrv, (SOCKADDR*)&addrClient, &len); char sendBuf[50]; printf(sendBuf, "Welcome %s to here!\n", inet_ntoa(addrClient.sin_addr)); send(sockConn, sendBuf, strlen(sendBuf) + 1, MSG_NOSIGNAL); } // 使用 select() 函数实现非阻塞接收客户端消息 FD_ZERO(&fdReads); FD_SET(sockConn, &fdReads); ret = select(sockConn + 1, &fdReads, NULL, NULL, NULL); if (ret < 0) { break; } if (FD_ISSET(sockConn, &fdReads)) { char recvBuf[50]; recv(sockConn, recvBuf, 50, 0); printf("Received from client: %s\n", recvBuf); // 将客户端发送的消息广播给所有连接的客户端 for (SOCKET i = 0; i < FD_SETSIZE; i++) { if (FD_ISSET(i, &fdReads)) { send(i, recvBuf, strlen(recvBuf) + 1, MSG_NOSIGNAL); } } } } closesocket(sockSrv); WSACleanup(); return 0;}

#define _WINSOCK_DEPRECATED_NO_WARNINGS#include <stdio.h>#include <Winsock2.h>#ifndef MSG_NOSIGNAL#define MSG_NOSIGNAL 0#endif#pragma comment(lib,"ws2_32.lib")int main() { WORD wVersionRequested; WSADATA wsaData; int err; wVersionRequested = MAKEWORD(2, 2); err = WSAStartup(wVersionRequested, &wsaData); if (err != 0) { return 1; } if (LOBYTE(wsaData.wVersion) != 2 || HIBYTE(wsaData.wVersion) != 2) { WSACleanup(); return 1; } SOCKET sockSrv = socket(AF_INET, SOCK_STREAM, 0); int optval = 1; setsockopt(sockSrv, SOL_SOCKET, SO_REUSEADDR, (const char*)&optval, sizeof(optval)); 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)); listen(sockSrv, 5); SOCKADDR_IN addrClient; int len = sizeof(SOCKADDR); SOCKET sockConn = INVALID_SOCKET; fd_set fdReads; while (1) { // 使用 select() 函数实现非阻塞接收客户端连接 FD_ZERO(&fdReads); FD_SET(sockSrv, &fdReads); int ret = select(sockSrv + 1, &fdReads, NULL, NULL, NULL); if (ret < 0) { break; } if (FD_ISSET(sockSrv, &fdReads)) { sockConn = accept(sockSrv, (SOCKADDR*)&addrClient, &len); char sendBuf[50] = { 0 }; sprintf(sendBuf, "Welcome %s to here!\n", inet_ntoa(addrClient.sin_addr)); send(sockConn, sendBuf, strlen(sendBuf) + 1, MSG_NOSIGNAL); } // 使用 select() 函数实现非阻塞接收客户端消息 FD_ZERO(&fdReads); if (sockConn != INVALID_SOCKET) { FD_SET(sockConn, &fdReads); } ret = select(sockConn + 1, &fdReads, NULL, NULL, NULL); if (ret < 0) { break; } if (FD_ISSET(sockConn, &fdReads)) { char recvBuf[50] = { 0 }; recv(sockConn, recvBuf, 50, 0); printf("Received from client: %s\n", recvBuf); // 将客户端发送的消息广播给所有连接的客户端 for (SOCKET i = 0; i < FD_SETSIZE; i++) { if (FD_ISSET(i, &fdReads)) { send(i, recvBuf, strlen(recvBuf) + 1, MSG_NOSIGNAL); } } } } closesocket(sockSrv); WSACleanup(); return 0;}

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