刚刚学windows编程，所以想写学习笔记，这是一个简单的Socket 程序例子，开发环境是vc6：首先是TCPserver端：[cpp]view plaincopy1.#include "stdafx.h"2.#include <stdio.h>3.#include <winsock2.h>4.5.#pragma comment(lib,"ws2_32.lib")6.7.int main(int argc, char* argv[])8.{9.//初始化WSA10.WORD sockVersion = MAKEWORD(2,2);11. WSADATA wsaData;12.if(WSAStartup(sockVersion, &wsaData)!=0)13. {14.return 0;15. }16.17.//创建套接字18. SOCKET slisten = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);19.if(slisten == INVALID_SOCKET)20. {21. printf("socket error !");22.return 0;23. }24.25.//绑定IP和端口26. sockaddr_in sin;27. sin.sin_family = AF_INET;28. sin.sin_port = htons(8888);29. sin.sin_addr.S_un.S_addr = INADDR_ANY;30.if(bind(slisten, (LPSOCKADDR)&sin, sizeof(sin)) == SOCKET_ERROR)31. {32. printf("bind error !");33. }34.35.//开始监听36.if(listen(slisten, 5) == SOCKET_ERROR)37. {38. printf("listen error !");39.return 0;40. }41.42.//循环接收数据43. SOCKET sClient;44. sockaddr_in remoteAddr;45.int nAddrlen = sizeof(remoteAddr);46.char revData[255];47.while (true)48. {49. printf("等待连接...\n");50. sClient = accept(slisten, (SOCKADDR *)&remoteAddr, &nAddrlen);51.if(sClient == INVALID_SOCKET)52. {53. printf("accept error !");54.continue;55. }56. printf("接受到一个连接：%s \r\n", inet_ntoa(remoteAddr.sin_addr));57.58.//接收数据59.int ret = recv(sClient, revData, 255, 0);60.if(ret > 0)61. {62. revData[ret] = 0x00;63. printf(revData);64. }65.66.//发送数据67.char * sendData = "你好，TCP客户端！\n";68. send(sClient, sendData, strlen(sendData), 0);69. closesocket(sClient);70. }71.72. closesocket(slisten);73. WSACleanup();74.return 0;75.}client端：[cpp]view plaincopy1.#include "stdafx.h"2.#include <WINSOCK2.H>3.#include <STDIO.H>4.5.#pragma comment(lib,"ws2_32.lib")6.7.8.int main(int argc, char* argv[])9.{10.WORD sockVersion = MAKEWORD(2,2);11. WSADATA data;12.if(WSAStartup(sockVersion, &data) != 0)13. {14.return 0;15. }16.17. SOCKET sclient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);18.if(sclient == INVALID_SOCKET)19. {20. printf("invalid socket !");21.return 0;22. }23.24. sockaddr_in serAddr;25. serAddr.sin_family = AF_INET;26. serAddr.sin_port = htons(8888);27. serAddr.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");28.if (connect(sclient, (sockaddr *)&serAddr, sizeof(serAddr)) == SOCKET_ERROR)29. {30. printf("connect error !");31. closesocket(sclient);32.return 0;33. }34.char * sendData = "你好，TCP服务端，我是客户端!\n";35. send(sclient, sendData, strlen(sendData), 0);36.37.char recData[255];38.int ret = recv(sclient, recData, 255, 0);39.if(ret > 0)40. {41. recData[ret] = 0x00;42. printf(recData);43. }44. closesocket(sclient);45. WSACleanup();46.return 0;47.}然后是UDPserver端：[cpp]view plaincopy1.#include "stdafx.h"2.#include <stdio.h>3.#include <winsock2.h>4.5.#pragma comment(lib, "ws2_32.lib")6.7.int main(int argc, char* argv[])8.{9. WSADATA wsaData;10.WORD sockVersion = MAKEWORD(2,2);11.if(WSAStartup(sockVersion, &wsaData) != 0)12. {13.return 0;14. }15.16. SOCKET serSocket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);17.if(serSocket == INVALID_SOCKET)18. {19. printf("socket error !");20.return 0;21. }22.23. sockaddr_in serAddr;24. serAddr.sin_family = AF_INET;25. serAddr.sin_port = htons(8888);26. serAddr.sin_addr.S_un.S_addr = INADDR_ANY;27.if(bind(serSocket, (sockaddr *)&serAddr, sizeof(serAddr)) == SOCKET_ERROR)28. {29. printf("bind error !");30. closesocket(serSocket);31.return 0;32. }33.34. sockaddr_in remoteAddr;35.int nAddrLen = sizeof(remoteAddr);36.while (true)37. {38.char recvData[255];39.int ret = recvfrom(serSocket, recvData, 255, 0, (sockaddr *)&remoteAddr, &nAddrLen);40.if (ret > 0)41. {42. recvData[ret] = 0x00;43. printf("接受到一个连接：%s \r\n", inet_ntoa(remoteAddr.sin_addr));44. printf(recvData);45. }46.47.char * sendData = "一个来自服务端的UDP数据包\n";48. sendto(serSocket, sendData, strlen(sendData), 0, (sockaddr *)&remoteAddr, nAddrLen);49.50. }51. closesocket(serSocket);52. WSACleanup();53.return 0;54.}client端：[cpp]view plaincopy1.#include "stdafx.h"2.#include <stdio.h>3.#include <winsock2.h>4.5.#pragma comment(lib, "ws2_32.lib")6.7.int main(int argc, char* argv[])8.{9.WORD socketVersion = MAKEWORD(2,2);10. WSADATA wsaData;11.if(WSAStartup(socketVersion, &wsaData) != 0)12. {13.return 0;14. }15. SOCKET sclient = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);16.17. sockaddr_in sin;18. sin.sin_family = AF_INET;19. sin.sin_port = htons(8888);20. sin.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");21.int len = sizeof(sin);22.23.char * sendData = "来自客户端的数据包.\n";24. sendto(sclient, sendData, strlen(sendData), 0, (sockaddr *)&sin, len);25.26.char recvData[255];27.int ret = recvfrom(sclient, recvData, 255, 0, (sockaddr *)&sin, &len);28.if(ret > 0)29. {30. recvData[ret] = 0x00;31. printf(recvData);32. }33.34. closesocket(sclient);35. WSACleanup();36.return 0;37.}。