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Oct 25th, 2009

\n

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who can tell me what the use of "\n" is? and what the difference between

C Syntax (Toggle Plain Text)
scanf("%d",&j);
scanf("%d",&j);

and

C Syntax (Toggle Plain Text)
scanf("%d\n",&j)
scanf("%d\n",&j)

luoyangke

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Oct 25th, 2009

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Re: \n

In C, the '\n' character is a special type of character called a control character, these are characters that do something other then just display themselves, here is all the ones that I know:

\n = newline
\t = tab
\a = This one rocks, it makes the computer make a beeping sound

The difference between those follows:

Say you called the first one, then the user entered 'hello', j would now be 'hello', if you called the second one, j would be 'hello\n' and whenever you printed out j after the second one, it would print out hello followed by a newline

Last edited by tomtetlaw; Oct 25th, 2009 at 6:54 am.

tomtetlaw

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Oct 25th, 2009

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Re: \n

Here is a complete list

Ancient Dragon

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Oct 25th, 2009

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Re: \n

if i use this in a program its keep on taking the return key
the program not getting terminated, whats the problem?

C Syntax (Toggle Plain Text)
scanf("%d\n",&j)
scanf("%d\n",&j)

Iam3R

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Oct 25th, 2009

Re: \n

It discards unwanted white space.
A white-space character in the control string causes scanf() to skip over one or more leading white-space characters in the input stream.

C Syntax (Toggle Plain Text)
int main()
{
 char ch,ch1;
 
 printf("Enter two chars : ");
 scanf("%c\n%c",&ch,&ch1);
 printf("\n%c\n%c",ch,ch1);
 return 0;
}
int main()
{
 char ch,ch1;

 printf("Enter two chars : ");
 scanf("%c\n%c",&ch,&ch1);
 printf("\n%c\n%c",ch,ch1);
 return 0;
}

adatapost

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Oct 25th, 2009

thank you

thank you for the anwser

luoyangke

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Oct 25th, 2009

Re: \n

http://c-faq.com/stdio/scanfhang.html

Dave Sinkula

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