复制文件 [英] copying a file

问题描述

当我运行以下代码时


ifstream fin（" scenario.chk"，ios :: in | ios :: binary）;

ofstream fout（" out.chk"，ios :: out | ios :: binary）;


while（！fin.eof（））

{

fout.put（fin.get（））;

}


fin.close（）;

fout.close（）;


文件大小似乎有一个字节差异...

复制文件似乎也似乎因为它而腐败。


为什么这不起作用？并且

是否有更好的方法来复制文件？


（注意我不想运行复制文件命令...我将

插入中间的东西）

when i run the following code

ifstream fin("scenario.chk",ios::in | ios::binary);
ofstream fout("out.chk",ios::out | ios::binary);

while( !fin.eof() )
{
fout.put(fin.get());
}

fin.close();
fout.close();

there seems to be a one byte difference in filesize...
also the copied file seems to be corrupt because of it.

why doesn''t this work? and
is there a better way to copy the file?

(note that i dont want to run a "copy file" command... i will be
inserting stuff in the middle)

推荐答案

呃......使用更简单的测试文件。它实际上附加了额外的

字符..我只是不确定为什么。我猜..它需要尝试阅读

另一个字符才被标记为文件结尾。

uhh..using a simpler test file.. it does in fact append an extra
character.. i''m just not sure why. i guess.. it needs to try reading
another character before it is flagged as end of file.

it''因为我正在读二进制文字不是吗？

？将是eof角色...

问题是..我如何检查它？

it''s because i''m reading and writing in binary isn''t it?
? would be the eof character...
question is.. how do i check for it?

嗯......是否有一个比


更有效的解决方案（fin.good（））

{

c = fin.get（） ;

if（c！= EOF）fout.put（c）;

}


并且必须检查每个角色看它是否是EOF？

uhhm... is there a more efficient solution than

while( fin.good() )
{
c = fin.get();
if( c != EOF ) fout.put(c);
}

and having to check every character to see if its the EOF?

这篇关于复制文件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！