Question

如何将C++输出流写到文件上去？

包括如何建文件，和如何写过去，如何关闭...谢谢，我闻见这块学的很烂

Answer 1

using namespace System;
using namespace System::IO;
using namespace System::Text;

int main()
{
String^ path = "c:\\temp\\MyTest.txt"; //文件的路径
{
FileStream^ fs = File::Create( path ); //创建文件
try
{
AddText( fs, "This is some text" );
AddText( fs, "This is some more text," );
AddText( fs, "\r\nand this is on a new line" );
AddText( fs, "\r\n\r\nThe following is a subset of characters:\r\n" );
for ( int i = 1; i < 120; i++ )
{
AddText( fs, Convert::ToChar( i ).ToString() );

if ( Math::IEEERemainder( Convert::ToDouble( i ), 10 ) == 0 )
{
AddText( fs, "\r\n" );
}
}
}
finally
{
if ( fs )
delete (IDisposable^)fs;
}
}

{
FileStream^ fs = File::OpenRead( path );//打开文件，后面代码是完成读文件内容
try
{
array<Byte>^b = gcnew array<Byte>(1024);
UTF8Encoding^ temp = gcnew UTF8Encoding( true );
while ( fs->Read( b, 0, b->Length ) > 0 )
{
Console::WriteLine( temp->GetString( b ) );
}
}
finally
{
if ( fs )
delete (IDisposable^)fs;
}
}
}

void AddText( FileStream^ fs, String^ value ) //写入文件
{
array<Byte>^info = (gcnew UTF8Encoding( true ))->GetBytes( value );
fs->Write( info, 0, info->Length );
}

这够全了吧 =。=

追问

编译器通不过，VC++6.0的

Answer 2

定义一个fstream或者ofstream
然后和一个文件关联。就可以用<<那样了
ofstream fout;
fout.open("file",ios_base::out);
fout<<"132123"<<endl;
fout.close();

追问

我的原始代码很简单#include
#include
int main()
{
using namespace std;
string words;
while(cin>>words&&words!="q")
cout<<words;
return 0;
}
就是想把这个输出流写到文件里，大神你帮个忙，帮我实现哈，我不会文件...

追答

#include
#include
#include
using namespace std;
void main()
{
string s;
char file[30];
ofstream fout;
cout>file;
cout>s;
fout.open(file,ios::out);
if(s!="q")
{
fout<<s;
}
fout.close();

}

追问

找不到文件...而且输入是30个字符内吧，受限制了

追答

我vc6.0成功了啊。这个应该是找不到文件就自动创建一个吧。我的就是自动创建了

Answer 3

路过