Login or Register to Ask a Question and Join Our Community


Programming

fscanf

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Programming fscanf
# 1  
Old 02-14-2006
fscanf
Hi,


Can any one tell me what "%hx" as control parameter mean in fscanf.


Thanks,

abey
# 2  
Old 02-14-2006
"%hx" - to retrieve value of the type unsigned short
# 3  
Old 02-14-2006
Hi,

Thanks for the reply, but "%x" also seems to retrive the same value. Can you please let me know the contexts on which these two are used??

thanks,

abey
# 4  
Old 02-14-2006
Quote:
Originally Posted by abey
Hi,

Thanks for the reply, but "%x" also seems to retrive the same value. Can you please let me know the contexts on which these two are used??

thanks,

abey
'%x' would retrieve value of datatype unsigned int.
whereas '%hx' would retrieve value of datatype unsigned short int
take note of the modifier
# 5  
Old 02-14-2006
%hx and %x are equivalent only if
"int" and "short int" are the same types.
If they're not then you can get strange results.
E.g. if you specify %hx and supply address of int variable
then scanf() will fill only 2 bytes of 4.

Hope this helps.
Login or Register to Ask a Question

Previous Thread | Next Thread

7 More Discussions You Might Find Interesting

1. Programming

Fscanf to get number and replace.

Hi, I have a file with contents like "abcd 1234" .What i need is get that integer and replace that with 0. So i used fscanf(fp,"%s %d", str, &num); This is having some problem. There can be multiple space/tab between string and number. How to replace that number with 0 in same file? (4 Replies)
Discussion started by: explore
4 Replies

2. UNIX for Dummies Questions & Answers

how fscanf every two data

hi there... i have a question regarding the fscanf function... let's say i have a data: 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 how do i read only the first COLUMN, or the second COLUMN or the third COLUMN or etc....?????? thanks (1 Reply)
Discussion started by: theunknown
1 Replies

3. Programming

fscanf: read words from file

Hi I have a file like that: 1 2 3 4 5 6 7 8 and I want print on stdout: 1 3 8 in other words i want choose what print out. I was thinking to use fscanf as: fscanf(file_in,"%d %d %d",&a, &b,&c); but in this way i get: 1 2 3 Is there a solution using fscanf to obtain my... (2 Replies)
Discussion started by: Dedalus
2 Replies

4. Programming

C, using fscanf

hey guys, I'm working on a term project for a c/unix class. The basis of the program is that it will calculate the weight/balance of a plane. I'm hoping to have an input file as such: " Pilot weight: Passenger weight: baggage wieght: etc " and the idea is that I'm trying to use... (2 Replies)
Discussion started by: jlangholzj
2 Replies

5. Programming

read a file wich fscanf() in a function

I use fopen, fscanf, fclose to read a file. It can work well. since many files should be read, a function is created with the same code. But in the function, fscanf can not work well. for example, the first line of the the file is: > filename but the fscanf will give: 207/23/eee/34 it appears... (2 Replies)
Discussion started by: cdbug
2 Replies

6. Programming

fscanf()

I keep trying to use fscanf() and for some reason I can't get the syntax down and always get seg faults. I'm on a SunOS 5.5.1, and my current code looks like this: int n1, n2, n3, n4, n5, n6; /* open config file */ if (fileptr = fopen(filename,"r") == NULL) { printf("couldn't open... (3 Replies)
Discussion started by: j_t_kim
3 Replies

7. Programming

fscanf()

thanks to everyone for your earlier replies, but i have yet another problem with file i/o. i'm trying to read multiple lines with the same file, and have been using the following code to take in the first two lines from a file... fscanf(fileptr, "%d %d %d %d %d %d\n", &n1, &n2, &n3, &n4, &n5,... (1 Reply)
Discussion started by: j_t_kim
1 Replies
Login or Register to Ask a Question