Yeah, cheers mate, that did the trick.
Ah, it's amazing, a few weeks ago I thought I knew it all with C, but these dynamic parameters are a totally new challenge for me, and yet again, it's the simple things with pointers that I mess up on.
Thanks alot.
toWrite should be an int: FAQ.Code:void ReadGroup(FILE **PtrfilePtr) { char toWrite; while (toWrite != EOF) { toWrite = getc(*PtrfilePtr); printf("%c", toWrite); } }
Last edited by Dave_Sinkula; 01-17-2005 at 03:05 PM.
7. It is easier to write an incorrect program than understand a correct one.
40. There are two ways to write error-free programs; only the third one works.*
Some people may ask, why int and not char? Well, *sits down in front of a fire and hands out cookies and milk*, you see...Code:void ReadGroup(FILE **PtrfilePtr) { int toWrite; while (toWrite != EOF) { toWrite = getc(*PtrfilePtr); printf("%c", toWrite); } }
char = 1 byte
int = 4 byte
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You see, char's can only hold so many values, 255 to be exact. EOF is not part of the family of 255. You have to remember that char is a number. So we use the ~32000 values of int to be used as error messages, because a char doesn't have enough values, because they're all reserved for real character values.
Please shut up now, and remain that way until you learn more.Some people may ask, why int and not char? Well, *sits down in front of a fire and hands out cookies and milk*, you see...
char = 1 byte
int = 4 byte
-----------
You see, char's can only hold so many values, 255 to be exact. EOF is not part of the family of 255. You have to remember that char is a number. So we use the ~32000 values of int to be used as error messages, because a char doesn't have enough values, because they're all reserved for real character values
No cookie for you
I see, that's a good point. I actually thought that EOF was a special character, but I see it's a macro.
Thanks again.
Just to point this out, 2^32 is not 32000. It's roughly four billion. You're thinking of two byte integers, or what's usually (x86-ish) known as "16 bit integers". I'd suggest upgrading your compiler while you're busy learning more.Originally Posted by Kleid-0
And for the record, a char is CHAR_BIT bits in size (excluding potential padding), and has a value range of CHAR_MIN through CHAR_MAX.
Quzah.
Hope is the first step on the road to disappointment.
