What char represent "a new line"?13 or 10, or both?
I got a lot of problem when read a char. Eg.
========
1 2
a b
========
If I write:
int n1,n2;
char c1,c2;
scanf("%d%d",&n 1,&n2);
scanf("%c%c",&c 1,&c2);
I got:
c1=10('\n')
c2=97('a')
So I must wrote:
int n1,n2;
char c1,c2;
scanf("%d%d",&n 1,&n2);
scanf("%c",c1);
scanf("%c%c",&c 1,&c2);
But I don't know if the char of new line in linux is also 10, or 10&13.
If I need to read some more complex vars & chars, how can I solve this
problem?
Nov 15 '05
13  36232 
On 11 Nov 2005 04:06:13 -0800, in comp.lang.c , "Betaver"
<Be*****@gmail. com> wrote: What char represent "a new line"?13 or 10, or both?
Neither.
From C's perspective, \n is a newline, and \r is a carriage return.
I got a lot of problem when read a char. Eg.
scanf("%d%d",& n1,&n2);
Don't use scanf.
Its hard to use (as you have found), and dangerous. It doesn't consume
newlines, has poor error checking, and so forth.
See section 12.18, 12.20 and indeed anything from 12.12 in the FAQ.
--
Mark McIntyre
CLC FAQ <http://www.eskimo.com/~scs/C-faq/top.html>
CLC readme: <http://www.ungerhu.com/jxh/clc.welcome.txt >
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On 11 Nov 2005 05:51:20 -0800, in comp.lang.c , "Betaver"
<Be*****@gmail. com> wrote: Er, too hard to me. Too special C and system works.
If you open a file in text mode, your OS may translate some
characters.
If you open it in binary mode, it may not.
For instance Windows typically uses two characters for a newline. When
reading it into a text editor, the two get converted into a single
'\n'. However when reading it into a hex editor, they don't.
So can I only use one scanf("%c") for each newline and it works well
both in Linux & Windows?
If the file is opened in text mode. But please don't use scanf.
--
Mark McIntyre
CLC FAQ <http://www.eskimo.com/~scs/C-faq/top.html>
CLC readme: <http://www.ungerhu.com/jxh/clc.welcome.txt >
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On 11 Nov 2005 05:32:49 -0800, in comp.lang.c , "Betaver"
<Be*****@gmail. com> wrote: To Emmanuel:
But why my 8bytes file windows shows 10bytes?
Because thats how your OS shows the file to different applications (in
this case, "ls" and your own programme).
On OpenVMS it would have a disk size of 512 bytes, but still only be
eight bytes of data.
--
Mark McIntyre
CLC FAQ <http://www.eskimo.com/~scs/C-faq/top.html>
CLC readme: <http://www.ungerhu.com/jxh/clc.welcome.txt >
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