大家好，我想请教一个关于在VC++2005的环境下使用文件流的问题。谢谢！
#include<fstream>
#include<process.h>
#include<iostream>
using namespace std;

void main(){
char filename[256],buf[100];
fstream sfile,dfile;
cout<<"输入源文件路径名:"<<endl;
cin>>filename;
sfile.open(filename,ios::in|ios::nocreate);//打开一个已存在的文件

//............


出错信息如下：
.\00.cpp(11) : error C2065: “nocreate”: 未声明的标识符
.\00.cpp(16) : error C2039: “nocreate”: 不是“std::basic_ios<_Elem,_Traits>”的成员




这是什么问题？在VC++6.0中是可以编译通过的，通道说vc++2005对文件流类做了改进？？？




[解决办法]

C/C++ code

 sfile.open(filename,ios::in | ios::_Nocreate);
[解决办法]
ios::nocreate);//
ios::  后面的内容跟你用的平台有关系的，有些平台上就是不认识，可能是库不一样的原因造成的，你可以打开源文件看看，都是宏。
linux unix你man一下就知道了。
[解决办法]
偶查到的是 sfile.open(filename,ios::in || ios::_Nocreate );

粘贴部分2005源码。

template<class _Dummy>
const typename _Iosb<_Dummy>::_Fmtflags _Iosb<_Dummy>::skipws;
template<class _Dummy>
const typename _Iosb<_Dummy>::_Fmtflags _Iosb<_Dummy>::unitbuf;
template<class _Dummy>
const typename _Iosb<_Dummy>::_Fmtflags _Iosb<_Dummy>::uppercase;
template<class _Dummy>
const typename _Iosb<_Dummy>::_Fmtflags _Iosb<_Dummy>::showbase;
template<class _Dummy>
const typename _Iosb<_Dummy>::_Fmtflags _Iosb<_Dummy>::showpoint;
template<class _Dummy>
const typename _Iosb<_Dummy>::_Fmtflags _Iosb<_Dummy>::showpos;
template<class _Dummy>
const typename _Iosb<_Dummy>::_Fmtflags _Iosb<_Dummy>::left;
template<class _Dummy>
const typename _Iosb<_Dummy>::_Fmtflags _Iosb<_Dummy>::right;
template<class _Dummy>
const typename _Iosb<_Dummy>::_Fmtflags _Iosb<_Dummy>::internal;
template<class _Dummy>
const typename _Iosb<_Dummy>::_Fmtflags _Iosb<_Dummy>::dec;
template<class _Dummy>
const typename _Iosb<_Dummy>::_Fmtflags _Iosb<_Dummy>::oct;
template<class _Dummy>
const typename _Iosb<_Dummy>::_Fmtflags _Iosb<_Dummy>::hex;
template<class _Dummy>
const typename _Iosb<_Dummy>::_Fmtflags _Iosb<_Dummy>::scientific;
template<class _Dummy>
const typename _Iosb<_Dummy>::_Fmtflags _Iosb<_Dummy>::fixed;
template<class _Dummy>
const typename _Iosb<_Dummy>::_Fmtflags _Iosb<_Dummy>::boolalpha;
template<class _Dummy>
const typename _Iosb<_Dummy>::_Fmtflags _Iosb<_Dummy>::_Stdio;
template<class _Dummy>
const typename _Iosb<_Dummy>::_Fmtflags _Iosb<_Dummy>::adjustfield;
template<class _Dummy>
const typename _Iosb<_Dummy>::_Fmtflags _Iosb<_Dummy>::basefield;
template<class _Dummy>
const typename _Iosb<_Dummy>::_Fmtflags _Iosb<_Dummy>::floatfield;

template<class _Dummy>
const typename _Iosb<_Dummy>::_Iostate _Iosb<_Dummy>::goodbit;
template<class _Dummy>
const typename _Iosb<_Dummy>::_Iostate _Iosb<_Dummy>::eofbit;
template<class _Dummy>
const typename _Iosb<_Dummy>::_Iostate _Iosb<_Dummy>::failbit;
template<class _Dummy>
const typename _Iosb<_Dummy>::_Iostate _Iosb<_Dummy>::badbit;
template<class _Dummy>
const typename _Iosb<_Dummy>::_Iostate _Iosb<_Dummy>::_Hardfail;

template<class _Dummy> 
 
const typename _Iosb<_Dummy>::_Openmode _Iosb<_Dummy>::in;
template<class _Dummy>
const typename _Iosb<_Dummy>::_Openmode _Iosb<_Dummy>::out;
template<class _Dummy>
const typename _Iosb<_Dummy>::_Openmode _Iosb<_Dummy>::ate;
template<class _Dummy>
const typename _Iosb<_Dummy>::_Openmode _Iosb<_Dummy>::app;
template<class _Dummy>
const typename _Iosb<_Dummy>::_Openmode _Iosb<_Dummy>::trunc;
template<class _Dummy>
const typename _Iosb<_Dummy>::_Openmode _Iosb<_Dummy>::_Nocreate;
template<class _Dummy>
const typename _Iosb<_Dummy>::_Openmode _Iosb<_Dummy>::_Noreplace;
template<class _Dummy>
const typename _Iosb<_Dummy>::_Openmode _Iosb<_Dummy>::binary;

template<class _Dummy>
const typename _Iosb<_Dummy>::_Seekdir _Iosb<_Dummy>::beg;
template<class _Dummy>
const typename _Iosb<_Dummy>::_Seekdir _Iosb<_Dummy>::cur;
template<class _Dummy>
const typename _Iosb<_Dummy>::_Seekdir _Iosb<_Dummy>::end;