借鉴，源码非原创，来自MagicSaring的一个简单的TCP通信程序Demo。
一、客户端源码：
#include
#include
#include "client.h" using namespace std; #pragma comment(lib, "WS2_32.lib") //表示链接WS2_32.lib这个库。 #define PORT 1024 int connectToServer(char* send_msg) { SOCKET sock_client; struct sockaddr_in server_addr; int addr_len = sizeof(struct sockaddr_in); char msgbuffer[1000]; memset(msgbuffer, 0, sizeof(msgbuffer)); // 初始化 winsock2.dll[12/27/2017 MagicScaring] WSADATA wsaData; WORD wVersionRequested = MAKEWORD(2, 2); //生成版本号 if (WSAStartup(wVersionRequested, &wsaData) != 0) { cout << "加载 winsock.dll失败" << endl; return 0; } // 创建套接字 [12/27/2017 MagicScaring] if ((sock_client = socket(AF_INET, SOCK_STREAM, 0)) == SOCKET_ERROR) { cout << "创建套接字失败! 错误代码:" << WSAGetLastError() << endl; WSACleanup(); //注销WinSock动态链接库 return 0; } // 填写服务器地址 [本机地址] char IP[20] = { "192.168.1.106" }; /*char IP[20]; cout << "输入服务器地址:" << endl; cin >> IP;*/ memset((void*)&server_addr, 0, sizeof(server_addr)); server_addr.sin_family = AF_INET; server_addr.sin_port = htons(PORT); server_addr.sin_addr.s_addr = inet_addr(IP); // 与服务器建立连接 [2018/5/22] if (connect(sock_client, (struct sockaddr*)&server_addr, addr_len) == SOCKET_ERROR) { cout << "连接失败! 错误代码:" << WSAGetLastError() << endl; closesocket(sock_client); WSACleanup(); return 0; } while (true) { int size; if ((size = recv(sock_client, msgbuffer, sizeof(msgbuffer), 0)) == SOCKET_ERROR) { cout << "接收信息失败！ 错误代码：" << WSAGetLastError() << endl; closesocket(sock_client); WSACleanup(); return 0; } else if (size == 0) { cout << "对方已关闭连接" << endl; closesocket(sock_client); WSACleanup(); return 0; } else { cout << "The message from Server:" << msgbuffer << endl; } //char send_msg[1000] = { "Hello server" }; //send_msg是要发送的数据，是char指针 if ((size = send(sock_client, send_msg, sizeof(send_msg), 0)) == SOCKET_ERROR) { cout << "发送信息失败! 错误代码:" << WSAGetLastError() << endl; } else if (size == 0) { cout << "对方已关闭连接" << endl; } else { cout << "信息发送成功" << endl; } } closesocket(sock_client); WSACleanup(); return 0; }
二、主程序调用
connectToServer(s_buf);
注意主程序头文件库的顺序，winSock2.h放在最前面。
至于为什么，I dont know.
三、服务器源码
#include "stdafx.h"
#include
#include
using namespace std; #pragma comment(lib, "WS2_32.lib") //表示链接WS2_32.lib这个库。 #define PORT 1024 int main() { SOCKET sock_server, newsock; struct sockaddr_in server_addr, client_addr; char msg[] = { "Hello client" }; // 初始化 winsock2.dll[12/27/2017 MagicScaring] WSADATA wsaData; WORD wVersionRequested = MAKEWORD(2, 2); //生成版本号 if (WSAStartup(wVersionRequested, &wsaData) != 0) { cout << "加载 winsock.dll失败" << endl; return 0; } // 创建套接字 [12/27/2017 MagicScaring] if ((sock_server = socket(AF_INET, SOCK_STREAM, 0)) == SOCKET_ERROR) { cout << "创建套接字失败! 错误代码:" << WSAGetLastError() << endl; WSACleanup(); //注销WinSock动态链接库 return 0; } // 填写需要绑定的本地地址 [] int addr_len = sizeof(struct sockaddr_in); memset((void*)&server_addr, 0, sizeof(server_addr)); server_addr.sin_family = AF_INET; server_addr.s