Reading hexadecimal values for a file

Hi! I'm trying to read some values stored in a file.The file looks like this:

GENIUS 0 0x0080000000000000 black_pawn1
GENIUS 1 0x0040000000000000 black_pawn2

.................................................................................................................

and it stores the startup positions for the chess pieces.
I tryed something like this but it doesn't work:
<h3>fscanf(fp,"%d%xll",&id,&move);</h3> where ll is for unsigned __int64 or at least this is what i want. it to be(in case i'm wrong)
//**********************************************************
FILE* fp;
char buffer[100];
unsigned __int64 move;
unsigned int id;
CList* node;


fp=fopen("startup.txt","rt");
if(!fp)return false;


while(!feof(fp))
{

fscanf(fp,"%s",buffer);
fscanf(fp,"%d%xll",&id,&move);
node=new CList(move,id);


if(!stricmp(buffer,"GENIUS"))
{
geniusList.Insert(node);
}else{

if(!stricmp(buffer,"MINIME"))

{


minimeList.Insert(node);

}






}









fgets(buffer,100,fp);






}








return true;

}





ThankX!

Give up fscanf and FILE and use fstream from STL.

Second, try to make your posts more appealing by using tags, such as CODE, QUOTE, etc.

Also give up on CList and use STL collections, std::list if appropriate.

Quote:

---

Originally Posted by Daos

Hi! I'm trying to read some values stored in a file.The file looks like this:

GENIUS 0 0x0080000000000000 black_pawn1
GENIUS 1 0x0040000000000000 black_pawn2

.................................................................................................................

and it stores the startup positions for the chess pieces.
I tryed something like this but it doesn't work:
fscanf(fp,"%d%xll",&id,&move); where ll is for unsigned __int64 or at least this is what i want. it to be(in case i'm wrong)

---

You never said if the compiler was MS VC++ (I'll assume yes given the __int64), so here is the quick answer:

Code:

---

fscanf(fp, "%d 0x%16I64X, &id, &move);

---

where id is an int and move is __int64.

Code:

---

Here is the breakdown:

  " 0x" to match the space and 0x in your example
  "%16I64X" 16 - the size for a 64 bit integer
          I64 - To tell VC++ compiler the variable is __int64
            X - the string is hexadecimal values

---

What if one would like to have the value of an _int64 displayed in decimal form.
What the string formatting should be :
Would it be :
myString.Format("%16I64d",mylonglong);
Thanks for any help.

You could use fstream for reading in the data but personally I dislike reading this way much of the time - I prefer to read a line at a time then tokenize it. boost::tokenizer is good for this but if you don't have that, it is simple enough to write your own in a couple of lines with std::string's "find" or "find_first_of" command.

The "0x" is used only for code and isn't part of the input/output of a hex number. You'd have to cut that off before converting (which is why tokenizing can be good in this instance).