Unable to get this working!

[Pizzaman]

Hello,

I am trying to load up bitmaps onto DirectX surfaces. Well anyway...

this is the function prototype:

Load_Bitmap_File(BITMAP_FILE_PTR bitmap, char *filename);

so I tried to read the bitmap names from a file with the following:

infile.open("TileBitmap.dat");
  int value = 0;
  char tempFilename[256] = {0};
  
 
  while(infile)
  {
    infile >> value; //get the bitmap number
    infile.getline(tempFilename, 256); //get the filename.bmp
    MessageBox(main_window_handle, tempFilename, "Test", MB_OK);
   
    if (!(Load_Bitmap_File(&bit, tempFilename)))
    {
      infile.close(); //close the file
      return 0; //and report error
    }
    LoadBitmapSurface(Tiles[value], surface_desc, bit, TILE_WIDTH, TILE_HEIGHT); //if all good, load it into surface array

  }
  infile.close();

and the darn thing fails with the Load_Bitmap_File
notice the MessageBox function, it outputs the contents of tempFilename. It displays filename.bmp. So it got the name, but it won't load the bitmap.

So I tried... manual initialization

char tempFilename[256] = "filename.bmp"
Load_Bitmap_File(&bit, tempFilename);

and that works fine! So what could be the problem here? is it somethhing with the cin.getline?? I checked the length, and it was correct...

-Pizzaman

[redhead]

Why initialize tempFile with char tempFilename[256] = {0};?
it's not the value 0 you want to store there, but NULL.

You also might wat to check, that Load_Bitmap_File returns 0(NULL) in case of an error.. I havn't worked with that function so I can't comment on that.

[Dante Shamest]

NULL is a macro for 0 in most cases.

[Pizzaman]

Well I got rid of the initialization {0}.

The function does return(0) in case of error, that's how I caught it. Does it have something to do with infile.getline() not extracting the string properly?

The file is organized:

0 grass1.bmp
1 grass2.bmp
...

Where I get the value first using infile >> value. Then I get the string using infile.getline().

And Load_Bitmap_File is not a standard function, it's by Andre LaMothe, I got it from his book.

-Pizzaman

[sde]

Originally posted by Dante Shamest
NULL is a macro for 0 in most cases.

i believe there is a distinct difference between null and 0 in most cases.

0 is an integer value.

[Pizzaman]

Well thanks guys for the help.

I found my way around it. Instead of having the integer in front of each bitmap name, I just have the bitmap names.

Another forum suggested that there might be an embedded carriage reture. But I checked for that too, and nothing works.

-Pizzaman

[npa]

Originally posted by sde
i believe there is a distinct difference between null and 0 in most cases.

Not in c++ there isn't.