fstream 的用法——文件拷贝

转自 http://blog.sina.com.cn/s/blog_700a65cc0100mieb.html
当ifstream read到文件尾，返回0值，其它时候返回非0值。下面给出一个用C++标准库实现文件拷贝的函数：

#include<iostream>

#include<fstream>

#include<string>

usingnamespace std;

constint BUFSIZE
= 1024 * 1024;

void CopyRawFile(string
InFile, string OutFile)

{

char*
pchar = newchar[BUFSIZE];

ofstream
ofile;

ifstream
ifile;

ofile.open(OutFile.c_str(),
ios::binary);

ifile.open(InFile.c_str(),
ios::binary);

while(ifile.read(pchar,
BUFSIZE))

ofile.write(pchar,
BUFSIZE);

ofile.write(pchar,
ifile.gcount());

ifile.close();

ofile.close();

delete []pchar;

}