windows:(客户端)
#include<WINSOCK2.H>#include<STDIO.H>#include<iostream>#include<cstring>#include <string>using namespace std;#pragma comment(lib, "ws2_32.lib")void socket_customer(){WORD sockVersion = MAKEWORD(2, 2);WSADATA data;if (WSAStartup(sockVersion, &data) != 0){return ;}while (true) {SOCKET sclient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);if (sclient == INVALID_SOCKET){printf("invalid socket!");return ;}sockaddr_in serAddr;serAddr.sin_family = AF_INET;serAddr.sin_port = htons(1500);serAddr.sin_addr.S_un.S_addr = inet_addr("118.25.210.143");if (connect(sclient, (sockaddr *)&serAddr, sizeof(serAddr)) == SOCKET_ERROR){ //连接失败 printf("connect error !");closesocket(sclient);return ;}string data;cin >> data;const char * sendData;sendData = data.c_str(); //string转const char* //char * sendData = "你好，TCP服务端，我是客户端\n";send(sclient, sendData, strlen(sendData), 0);//send()用来将数据由指定的socket传给对方主机//int send(int s, const void * msg, int len, unsigned int flags)//s为已建立好连接的socket，msg指向数据内容，len则为数据长度，参数flags一般设0//成功则返回实际传送出去的字符数，失败返回-1，错误原因存于error char recData[255];int ret = recv(sclient, recData, 255, 0);if (ret>0) {recData[ret] = 0x00;printf(recData);}closesocket(sclient);}WSACleanup();return;}
linux服务器:server.c
参考：/wangyf101/article/details/9790807#commentsedit
但是作者代码空格有问题，需要全部删掉。复制下面代码，改一下端口号就好了
#include <stdio.h>#include <sys/types.h>#include <sys/socket.h>#include <netinet/in.h>#include <arpa/inet.h>int main(){int server_sockfd;//服务器端套接字int client_sockfd;//客户端套接字int len;struct sockaddr_in my_addr;//服务器网络地址结构体struct sockaddr_in remote_addr; //客户端网络地址结构体int sin_size;char buf[BUFSIZ]; //数据传送的缓冲区memset(&my_addr,0,sizeof(my_addr));//数据初始化--清零my_addr.sin_family=AF_INET; //设置为IP通信my_addr.sin_addr.s_addr=INADDR_ANY; //服务器IP地址--允许连接到所有本地地址上my_addr.sin_port=htons(1500);//服务器端口号/*创建服务器端套接字--IPv4协议，面向连接通信，TCP协议*/if((server_sockfd=socket(PF_INET,SOCK_STREAM,0))<0){perror("socket");return 1;}/*将套接字绑定到服务器的网络地址上*/if (bind(server_sockfd,(struct sockaddr *)&my_addr,sizeof(struct sockaddr))<0){perror("bind");return 1;}/*监听连接请求--监听队列长度为5*/listen(server_sockfd,5);sin_size=sizeof(struct sockaddr_in);/*等待客户端连接请求到达*/if((client_sockfd=accept(server_sockfd,(struct sockaddr *)&remote_addr,&sin_size))<0){perror("accept");return 1;}printf("accept client %s\n",inet_ntoa(remote_addr.sin_addr));len=send(client_sockfd,"Welcome to my server\n",21,0); //发送欢迎信息/*接收客户端的数据并将其发送给客户端--recv返回接收到的字节数，send返回发送的字节数*/while((len=recv(client_sockfd,buf,BUFSIZ,0))>0){buf[len]='\0';printf("%s\n",buf);if(send(client_sockfd,buf,len,0)<0){perror("write");return 1;}}close(client_sockfd);close(server_sockfd);return 0;}
但是上面那段代码server段无法与client通信的
如果想要通信，具体参考：
/piaojun_pj/article/details/5920888
#include <stdio.h>#include <sys/types.h>#include <sys/socket.h>#include <netinet/in.h>#include <arpa/inet.h>int main(int argc, char *argv[]){int server_sockfd;//服务器端套接字int client_sockfd;//客户端套接字int len;struct sockaddr_in my_addr; //服务器网络地址结构体struct sockaddr_in remote_addr; //客户端网络地址结构体int sin_size;char buf[BUFSIZ]; //数据传送的缓冲区memset(&my_addr,0,sizeof(my_addr)); //数据初始化--清零my_addr.sin_family=AF_INET; //设置为IP通信my_addr.sin_addr.s_addr=INADDR_ANY;//服务器IP地址--允许连接到所有本地地址上my_addr.sin_port=htons(8000); //服务器端口号/*创建服务器端套接字--IPv4协议，面向连接通信，TCP协议*/if((server_sockfd=socket(PF_INET,SOCK_STREAM,0))<0){ perror("socket");return 1;}/*将套接字绑定到服务器的网络地址上*/if (bind(server_sockfd,(struct sockaddr *)&my_addr,sizeof(struct sockaddr))<0){perror("bind");return 1;}/*监听连接请求--监听队列长度为5*/listen(server_sockfd,5);sin_size=sizeof(struct sockaddr_in);/*等待客户端连接请求到达*/if((client_sockfd=accept(server_sockfd,(struct sockaddr *)&remote_addr,&sin_size))<0){perror("accept");return 1;}printf("accept client %s/n",inet_ntoa(remote_addr.sin_addr));len=send(client_sockfd,"Welcome to my server/n",21,0);//发送欢迎信息/*接收客户端的数据并将其发送给客户端--recv返回接收到的字节数，send返回发送的字节数*/while((len=recv(client_sockfd,buf,BUFSIZ,0))>0)){buf[len]='/0';printf("%s/n",buf);if(send(client_sockfd,buf,len,0)<0){perror("write");return 1;}}close(client_sockfd);close(server_sockfd);return 0;}
