网络编程实验2_(3)基于流式套接字的客户端程序设计

#define _WINSOCK_DEPRECATED_NO_WARNINGS
#include <iostream>
#include <winsock2.h>

using namespace std;

#pragma comment(lib, "ws2_32.lib")

#define PORT 7210
#define IP_ADDRESS "192.168.0.103"
//先用cmd命令行——ipconfig查一下自己的ip地址
#define MAX_LINE 10000

int main(int argc, char* argv[])
{
    WSADATA wsaData;
    SOCKET ClientSocket;
    struct sockaddr_in ServerAddr;
    int iResult = 0;
    int AddrLen = 0;
    HANDLE hThread = NULL;
    char SendBuffer[MAX_LINE];

    //初始化 Windows Socket
    if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0)
    {
        cout << "Windows Socket 初始化失败::" << GetLastError() << endl;
        WSACleanup();
        return -1;
    }
    //创建 Socket
    ClientSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    if (ClientSocket == INVALID_SOCKET)
    {
        cout << "Socket创建失败::" << GetLastError() << endl;
        closesocket(ClientSocket);
        WSACleanup();
        return -1;
    }

    ServerAddr.sin_family = AF_INET;
    ServerAddr.sin_addr.s_addr = inet_addr(IP_ADDRESS);
    ServerAddr.sin_port = htons(PORT);
    memset(ServerAddr.sin_zero, 0x00, 8);
    //这个有两种方法，
    //一种是像这样给ServerAddr中的前三个参数逐一赋值后，最后给sin_zero填充0
    //还有一种是，先用memset(&ServerAddr,0,sizeof(ServerAddr))对整个变量零填充，再对前三个参数逐一赋值
    /*
    memset(&ServerAddr, 0, sizeof(ServerAddr));
    ServerAddr.sin_family = AF_INET;
    ServerAddr.sin_addr.s_addr = inet_addr(IP_ADDRESS);
    ServerAddr.sin_port = htons(PORT);
    */


    //connect
    //一个细节：connect的第二个参数ServerAddr设置为sockaddr_in类型的变量，
    //然后再connect中应当将其强转为sockaddr类型
    iResult = connect(ClientSocket, (struct sockaddr*) & ServerAddr, sizeof(ServerAddr));
    if (iResult == SOCKET_ERROR)
    {
        cout << "Connect Error::" << GetLastError() << endl;
        WSACleanup();
        return -1;
    }
    else
    {
        cout << "连接成功!" << endl;
    }

    char RecvBuffer[MAX_LINE];//接收到的信息
    while (true)
    {
        cin.getline(SendBuffer, sizeof(SendBuffer),'$');
        iResult = send(ClientSocket, SendBuffer, (int)strlen(SendBuffer), 0);
        if (iResult == SOCKET_ERROR)
        {
            cout << "Send Info Error::" << GetLastError() << endl;
            break;
        }
        memset(RecvBuffer, 0x00, sizeof(RecvBuffer));
        //初始化,每个字节都用0填充
        iResult = recv(ClientSocket, RecvBuffer, MAX_LINE, 0);
        //接收服务器返回的信息
        cout << "接收到服务器信息为:" << RecvBuffer << endl;
        //输出接收到的信息
    }

    closesocket(ClientSocket);
    WSACleanup();

    return 0;
}