I just began using visual c++ and found it very different to normal c++
can someone tell me how to read a file and what to #include?
coz normal ifstream does not work

Visual C++ implements the C++ standard, so go figure on that one...

try iostream.h

If it doesn't work, I would imagine that you do not have your directories set correctly.

[ This Message was edited by: gian on 2002-10-12 21:28 ]

http://www.youngprogrammers.net/showdoc.php?id=4

Do you mind using the search engine next time?
[addsig]

Microsoft Visual C++ 6.0 does not implement the full C++ standard. That may cause some problems. I'd say it's mostly standard but you could find some quirks once in a while. In the other hand, Visual C++.NET does.

Hello Gian! It's been a while since I'v heard from you. Have you heard from RDD lately? [addsig]

Ive done what the tutorial says and when i compile it there is no errors
However when i try to build the object i egt some weird errors like inappropriate types used
the basic sample for my code is


#include
#include

LPTSTR filename;
filename = "inputfile.txt";
ifstream file;
file.open(filename);

LPTSTR header, colour;
int width, height;
file -->--> header;
file -->--> width;
file -->--> height;
file -->--> colour;

file.close();
the errors i get are

error LNK2001: unresolved external symbol "__declspec(dllimport) public: void __thiscall ifstream::`vbase destructor'(void)" (__imp_??_Difstream@@QAEXXZ)
ezrgb24.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: void __thiscall ifstream::close(void)" (__imp_?close@ifstream@@QAEXXZ)
ezrgb24.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: int __thiscall ios::eof(void)const " (__imp_?eof@ios@@QBEHXZ)
ezrgb24.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: class istream & __thiscall istream::operator-->-->(int &)" (__imp_??5istream@@QAEAAV0@AAH@Z)
ezrgb24.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: class istream & __thiscall istream::operator-->-->(char *)" (__imp_??5istream@@QAEAAV0@PAD@Z)
ezrgb24.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: void __thiscall ifstream::open(char const *,int,int)" (__imp_?open@ifstream@@QAEXPBDHH@Z)
ezrgb24.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: static int const filebuf::openprot" (__imp_?openprot@filebuf@@2HB)
ezrgb24.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: __thiscall ifstream::ifstream(void)" (__imp_??0ifstream@@QAE@XZ)
.\Debug\ezrgb24.ax : fatal error LNK1120: 8 unresolved externals



can anybody enlighten me on what i am doing wrong or what the erros mean?

I suspect that your project is not being linked against the iostreams library.

if you really compile the exact code as it is above (or better, in the HTML sources, since the include's will diasappear in HTML ) the stuff won't compile for sure afaik. I think you will need to put the code into a function called main() at least. Afaik nothing will work without a main() (WinMain or something like that in WinAPI).
But, that's just the case if you use the exact code as it is above
[addsig]

Kage: Those are linker errors. Nothing to do with is code not being in the 'main' method [addsig]

Its nothing to do with the main coz that code portion is inside a routine and runs without it. But when i add that part of the code in it just comes up with the errors.
Just thought maybe i was using fstream.h incorrectly.

how should I know that? you just said that you've started C++, and sometimes it just happens that you leave out the main func
[addsig]

I think KaGez is right. [addsig]

I am _always_ right!
(except when I'm wrong )
[addsig]

If you're using visual C++ for file I/O, CFile or CStdioFile are eaiser to use.

it will limit the portability of the code _extremely_ tho.
[addsig]

what kind of project is it that ur compiling?

Being a fellow VC++ jockey, (I dont get the fricken 'portability' thing and dont correct me Kagez) you first have to tell us what kind of project ur compiling. You should be doin a win32 console project, but for all i know, your compiling it through the console (you arnt are you?)