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    ʹÓÃCGIC¿âµÄ¼òÒª£º
    ¿âµÄº¯Êý˵Ã÷£º http://www.boutell.com/cgic/#cgiFormStringNoNewlines
    1. ´òÓ¡CGI±ê×¼Êä³öÍ·²¿£º
    cgiHeaderContentType£¨"text/plain"£©£»
    »òÕߣº
    fprintf£¨ stdout£¬ "Content-type£ºtext/plain\n\n"£©£»ºìÉ«²¿·Ö²»ÄÜд³ö“Contenttype”£¬·ñÔòä¯ÀÀÆ÷ÏÔʾÍøÒ³»á²»Õý³£¡£
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  //deal with "GET"/"POST" method
    if (strncmp(cgiRequestMethod, "post",4) == 0)
    {
        handlePostRequest();
    }
    else //"GET"
    {
        handleGetRequest();
    }
    3. »ñÈ¡QueryStringÖеĸ÷¸ö×Ö¶ÎÖµ£º
  cgiFormStringNoNewlines("query1", cmdstr, sizeof(cmdstr));
    if (strcmp(cmdStr, "ip_address") == 0)
    {
        ...
    }
    else
     ...
    4. CGIÊä³ö£ºfprintf£¨cgiOut£¬ "%s\n"£¬ cgi_Output£©£»
    ÒÔÏÂÊÇһЩϸ½Ú£º
    Ò»¡¢ C/C++±àдCGI³ÌÐòÖ®form´¦Àí
    1. GET
    2. POST
    3. ½áÊø
    ÎÒÃÇÓÐÒ»ÕÅweb
 test.html
 <html>
<head>
<title>form test</title>
</head>
<body>
<form method="get" name="test-get" action="./cgi-bin/test-get.cgi">
<input name="name"><input name="pswd"><input type=submit value="get">
</form>
<br><br>
<form method="post" name="test-post" action="./cgi-bin/t


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int main(void)
{
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unsigned int *p = (unsigned int *)((int)a +1);¢Ù
printf("%x\n", *p);
return 0;
}
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int chdir(const char *);       //change directory
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