[原]一个简单的TCP Client所涉及到的头文件

#include <iostream>
#include <string.h>
#include <sys/socket.h>    // Not need!
#include <netinet/in.h>    // struct sockadd_in, htons()
#include <arpa/inet.h>     // inet_addr()
#include <unistd.h>        // close()

int main(int argc, char** argv)
{
    if(argc < 2)
    {
        std::cout << "Usage: tcpClient [target IP]" << std::endl;
        return -1;
    }

    struct sockaddr_in sin;
    sin.sin_family = AF_INET;
    sin.sin_port = htons(6789);
    sin.sin_addr.s_addr = inet_addr(argv[1]);
    
    int cClient = socket(AF_INET, SOCK_STREAM, 0);
    if(cClient < 0)
    {
        std::cout << "socket failure!" << std::endl;
        return -1;
    }
    if(connect(cClient, (struct sockaddr*)&sin, sizeof sin) < 0)
    {
        std::cout << "connect failue!" << std::endl;
        return -1;
    }
    char szLine[256];
    while(std::cin >> szLine)
    {
        if(strcmp(szLine, "exit") == 0)
        {
            std::cout << "Bye!" << std::endl;
            break;
        }
        int sLen = send(cClient, szLine, strlen(szLine), 0);
        if (sLen <= 0)
        {
            std::cout << "send error!" << std::endl;
            break;
        }
        sLen = recv(cClient, szLine, sizeof szLine, 0);
        if(sLen <= 0)
        {
            std::cout << "recv error!" << std::endl;
            return -1;
        }
        szLine[sLen] = ‘\0‘;
        std::cout << "Received:" << szLine << std::endl;
    }
    close(cClient);

    return 0;
}

[xiaoku@localhost tcpClient]$ g++ main.cpp -o tcpClient