编写一个最为简单的tcp通信客户端。代码如下：
#include <iostream>#include <cstring>using namespace std;#include <sys/socket.h>#include <sys/types.h>#include <arpa/inet.h>#include <netinet/in.h>#include <errno.h>int main(){/*创建socket*/int sd = socket(AF_INET, SOCK_STREAM, 0);if (sd == -1){cout << "socket create error" << endl;cout << errno << ":" << strerror(errno) << endl; exit(-1);}/*定义服务器端地址*/struct sockaddr_in ser_addr = {0};ser_addr.sin_family = AF_INET;ser_addr.sin_port = htons(12222);ser_addr.sin_addr.s_addr = inet_addr("192.168.56.11");int ret = 0;/*连接服务器*/ret = connect(sd, (struct sockaddr*)&ser_addr, sizeof(ser_addr));if (ret == -1){cout << "socket connect error" << endl;cout << errno << ":" << strerror(errno) << endl; exit(-1);}/*通信*/char buf[100] = "Hello I am a Client";ret = send(sd, buf, strlen(buf)+1, 0);if(ret <= 0){cout << "send error" << endl;cout << errno << ":" << strerror(errno) << endl; exit(-1);}/*退出*/close(sd);return 0;}
，所有的胜利，与征服自己的胜利比起来，都是微不足道
