学步园

 1.MFC中的方法：(C++)</p> <p>CFileStatus status;<br /> CFile::GetStatus("D://test.txt",status);<br /> long lSizeOfFile;<br /> lSizeOfFile = status.m_size;</p> <p>lSizeOfFile的值就是D://test.txt文件的大小</p> <p>2.标准C获得文件大小的5种方法<br /> (注意："__FILE__"指的是当前文件，你可以改为有效路径的目标文件，比如"D://test.txt"）<br /> #include "stdafx.h"<br /> #include "stdio.h"<br /> #include <sys/stat.h><br /> #include <io.h><br /> #include <FCNTL.H></p> <p>int getfilesize()<br /> {<br /> int iresult;<br /> struct _stat buf;<br /> iresult = _stat(__FILE__,&buf);<br /> if(iresult == 0)<br /> {<br /> return buf.st_size;<br /> }<br /> return NULL;<br /> }</p> <p>int getfilesize01()<br /> {<br /> int fp;<br /> fp=_open(__FILE__,_O_RDONLY);<br /> if(fp==-1)<br /> return NULL;<br /> return _filelength(fp);<br /> //return NULL;<br /> }</p> <p>int getfilesize02()<br /> {<br /> int fp;<br /> fp=_open(__FILE__,_O_RDONLY);<br /> if(fp==-1)<br /> return NULL;<br /> return _lseek(fp,0,SEEK_END);<br /> //return NULL;<br /> }</p> <p>int getfilesize03()<br /> {<br /> int fp;<br /> fp=_open(__FILE__,_O_RDONLY);<br /> if(fp==-1)<br /> return NULL;<br /> return _lseek(fp,0,SEEK_END);<br /> //return NULL;<br /> }</p> <p>int getfilesize04()<br /> {<br /> FILE *fp;<br /> if((fp=fopen(__FILE__,"r"))==NULL)<br /> return 0;<br /> fseek(fp,0,SEEK_END);<br /> return ftell(fp); //return NULL;<br /> }</p> <p>int getfilesize05()<br /> {<br /> FILE *fp;<br /> char str[1];<br /> if((fp=fopen(__FILE__,"rb"))==NULL)<br /> return 0;<br /> for(int i = 0;!feof(fp);i++)<br /> {<br /> fread(&str,1,1,fp);</p> <p> }<br /> return i - 1; //return NULL;<br /> }</p> <p>int main(int argc, char* argv[])<br /> {</p> <p> printf("getfilesize()=%d/n",getfilesize());<br /> printf("getfilesize01()=%d/n",getfilesize01());<br /> printf("getfilesize02()=%d/n",getfilesize02());<br /> printf("getfilesize03()=%d/n",getfilesize03());<br /> printf("getfilesize04()=%d/n",getfilesize04());<br /> printf("getfilesize05()=%d/n",getfilesize05());<br /> return 0;<br /> }<br />