C語言下得到檔案的長度

#include <windows.h><br />#include <stdio.h></p><p>//擷取檔案的長度（單位：位元組）<br />HRESULT GetFileLen(LPCSTR szFileName, LONG *lFileLen)<br />{<br />FILE *fp=NULL;<br />LONG lBeg,lEnd;<br />*lFileLen=lBeg=lEnd=0;</p><p>fp = fopen(szFileName, "rb");<br />if ( fp )<br />{<br />fseek(fp, 0, SEEK_SET);<br />lBeg = ftell(fp);<br />fseek(fp, 0, SEEK_END);<br />lEnd = ftell(fp);<br />*lFileLen = lEnd - lBeg;<br />fclose(fp);<br />fp = NULL;<br />return S_OK;<br />}<br />return E_FAIL;<br />}</p><p>int main(void)<br />{<br />long len=0;<br />if ( FAILED(GetFileLen(".//GetFileLen.c", &len)) )<br />{<br />return -1;<br />}</p><p>printf("%d位元組/r/n", len);<br />getchar();<br />return 0;<br />}<br />