fileno.c

最新推荐文章于 2024-11-21 00:15:00 发布

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本文提供了一个使用C语言实现的程序示例，该程序通过命令行参数接收文件路径，并利用标准I/O库函数来打开文件并获取其长度。具体步骤包括使用`fileno()`获取文件描述符，再用`filelength()`函数测量文件大小。

name="google_ads_frame" marginwidth="0" marginheight="0" src="http://pagead2.googlesyndication.com/pagead/ads?client=ca-pub-5572165936844014&dt=1194442938015&lmt=1194190197&format=336x280_as&output=html&correlator=1194442937843&url=file%3A%2F%2F%2FC%3A%2FDocuments%2520and%2520Settings%2Flhh1%2F%E6%A1%8C%E9%9D%A2%2FCLanguage.htm&color_bg=FFFFFF&color_text=000000&color_link=000000&color_url=FFFFFF&color_border=FFFFFF&ad_type=text&ga_vid=583001034.1194442938&ga_sid=1194442938&ga_hid=1942779085&flash=9&u_h=768&u_w=1024&u_ah=740&u_aw=1024&u_cd=32&u_tz=480&u_java=true" frameborder="0" width="336" scrolling="no" height="280" allowtransparency="allowtransparency"> #include <stdio.h>
#include <io.h>

void main(int argc, char *argv[])
{
FILE *stream;

int handle;

long file_length;

   if (stream = fopen(argv[1], "r"))
     {
        // Some statements
        handle = fileno(stream);
        file_length = filelength(handle);
        printf("The file length is %ld/n", file_length);
        fclose(stream);
     }
   else
     printf("Error opening %s/n", argv[1]);
}