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'stream' Causing Compiler Errors

Started by brooksyd22 Sep 19, 2005 at 4:49 PM 7 replies 550+ views

Original Post

Sep 19, 2005 at 4:49 PM

I am trying to make a simple terrain engine and have come across a problem in opening a bitmap to read in the heightdata. However when using fstream I seem to be getting unresolved external symbols as below;


Assignment1 error LNK2001: unresolved external symbol "void * __cdecl operator new[](unsigned int,int,char const *,int)" (??_U@YAPAXIHPBDH@Z)
Assignment1 error LNK2019: unresolved external symbol "void * __cdecl operator new(unsigned int,int,char const *,int)" (??2@YAPAXIHPBDH@Z) referenced in function "public: __thiscall ofstream::ofstream(void)" (??0ofstream@@QAE@XZ)
Assignment1 error LNK2019: unresolved external symbol "void * __cdecl operator new[](unsigned int,int,char const *,int)" (??_U@YAPAXIHPBDH@Z) referenced in function "public: class filebuf * __thiscall filebuf::attach(int)" (?attach@filebuf@@QAEPAV1@H@Z)
Assignment1 fatal error LNK1120: 2 unresolved externals

To throw this error up I simply have to set a variable wih the ifstream method, nothing more than that. Does anybody know why I am getting this error? I have double checked that I have the correct files in my include directory and everything seems in place.

ukdeveloper

Sep 19, 2005 at 6:46 PM

The AP is right - we really need to see your code if at all possible if we're going to be able to help you, I'm afraid.

orcfan32

Sep 19, 2005 at 8:51 PM

If you have a linker error, then you are most likely not including something, or your linker parameters are incorrect. Of course, there can be other problems as well.

brooksyd22

Sep 20, 2005 at 7:28 AM

I am literally not putting much code into it at all, I have included the headers and then just tried to make an ifstream variable. Everything runs fine if I dont make the variable but as soon as I do then I get the linker errors. This below is literally what I have;

#include <fstream.h>#include <ostream.h>#include <process.h>bool GetHeightData(){    ifstream File;}

I havent included the rest of the class as I am at work now and dont have it, but it all works fine apart from making that damn variable!

SiCrane

Sep 20, 2005 at 7:31 AM

Try switching to the standard versions of the stream headers. i.e. instead of .

Enigma

Sep 20, 2005 at 7:33 AM

You're including non-existant headers. It should be:

#include <fstream>#include <ostream>#include <process.h>bool GetHeightData(){    std::ifstream File;}

The standard C++ headers have no ".h" on them.

Enigma

brooksyd22

Sep 21, 2005 at 7:24 AM

ok thanks a lot for the replies. I forgot to mention though that I am using C and not C++ so I guess that is why ifstream isnt working. I have decided to go with a different route and am using the fopen function to open my file (of type FILE*). Does anybody know of how to transfer the whole of the file (in this case a 128x128 RAW file) into a 1D buffer?

Zahlman

Sep 21, 2005 at 10:38 AM

Quote:
Original post by brooksyd22
ok thanks a lot for the replies. I forgot to mention though that I am using C and not C++

Oh. On your head be it, then.

Quote:
so I guess that is why ifstream isnt working.

Right. That functionality simply isn't part of C.

Quote:
I have decided to go with a different route and am using the fopen function to open my file (of type FILE*).

Yep; that's what you'll need.

Quote:
Does anybody know of how to transfer the whole of the file (in this case a 128x128 RAW file) into a 1D buffer?

Look up fread().

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