Re: AW: AW: [Dev-C++] reading a binary file

[Per W. <pw...@ia...>]

Make the following changes, and it will work.

A pointer is just that. A pointer to a block of memory. To use it, you
also must make the pointer point to some available memory. An
unininitalized pointer may point anywhere inside the computer, thereby
resulting in a crash when the program tries to follow the pointer for
either reading or writing.

Cheers

/Per Westermark

EMA System        email: pw...@ia...
Per Westermark    web: http://iapetus.neab.net
Vargvaegen 174B   phone: +46 8 410 17 198
S-906 42 Umeaa
Sweden


On Thu, 5 Sep 2002, Christian Wallukat wrote:

> Hi  Carlos ,  
>  
>  
> sorry,  but i send the wrong snipped (one of the trys)...
>  
> If I execute it as follows, it crashes...
>  
> Any idea ? 
>   
> 
>   
> 
> 
> #include "stdio.h" 
> #include "fstream.h" 
> #include "windows.h" 
>   
> 
> 
> int main(int argc, char* argv[]) 
> { 
>   BYTE  * buffer; 
>  int nRead = 0; 
> 
> 
   buffer = new BYTE[2048];
>  ifstream *fb = new ifstream; 
>  fb->open("c:\\out.cal"); 
> 
> 
>  if(fb->fail() != 0)printf("Cant opne\n"); 
> 
> 
>  fb->seekg(0); 
> 
> 
>  while (!fb->eof()) 
>  { 
>   fb->read(buffer, 2048); 
>   nRead = nRead + 2048; 
>   printf("%i\n", nRead); 
>  }; 
    delete[] buffer;
> 
> 
>  getchar(); 
>  return 0; 
> } 
>   
> 
> 
> If I execute this I get an acces voilation after the read function ... 
>   
> 
> 
> Does any one have an idea ? 
>   
> 
> 
> Kind r 
>   
> 
> 
> Christian 
> 
> 
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